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	<title>objects &#8211; USA NEWS LIVE</title>
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	<title>objects &#8211; USA NEWS LIVE</title>
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		<title>Comet Tsuchinshan-ATLAS is a Halloween visitor from the spooky Oort Cloud – the invisible bubble that houses countless space objects</title>
		<link>https://bloggingthree.soflytech.com/2024/10/comet-tsuchinshan-atlas-is-a-halloween-visitor-from-the-spooky-oort-cloud-the-invisible-bubble-that-houses-countless-space-objects/</link>
					<comments>https://bloggingthree.soflytech.com/2024/10/comet-tsuchinshan-atlas-is-a-halloween-visitor-from-the-spooky-oort-cloud-the-invisible-bubble-that-houses-countless-space-objects/#respond</comments>
		
		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Sat, 12 Oct 2024 14:58:20 +0000</pubDate>
				<category><![CDATA[Technology]]></category>
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		<guid isPermaLink="false">https://bloggingthree.soflytech.com/?p=17196</guid>

					<description><![CDATA[It could also be difficult for the human mind to conceptualize: a colossal cloud so colossal that it surrounds the sun and eight planets while stretching trillions of kilometers into space. The spherical envelope often known as the Oort cloud is virtually invisible. The individual particles are so thinly distributed and thus far from the [&#8230;]]]></description>
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<div itemprop="articleBody">
<p>It could also be difficult for the human mind to conceptualize: a colossal cloud so colossal that it surrounds the sun and eight planets while stretching trillions of kilometers into space. </p>
<p>The spherical envelope often known as the Oort cloud is virtually invisible. The individual particles are so thinly distributed and thus far from the sunshine of any star, including the Sun, that astronomers simply cannot see the cloud, although it envelops us like a blanket. </p>
<p>It&#39;s also theoretical. Astronomers conclude that the Oort cloud exists since it is the one logical explanation for the arrival of a certain class of comets that sporadically visit our solar system. It seems that the cloud is basically an enormous reservoir <a href="https://science.nasa.gov/solar-system/oort-cloud/facts/">could host billions of icy celestial bodies</a>. </p>
<p>Two of those bodies will fly past Earth in the times leading as much as Halloween. <a href="https://theskylive.com/c2023a3-info">Tsuchinshan ATLAS</a>also often known as Comet C/2023 A3, will likely be at its brightest and certain visible to the naked eye for per week or two after October 12, the day it&#8217;s closest to Earth &#8211; just look in only after sunset the western sky. As the times pass, the comet becomes fainter and moves higher within the sky. </p>
<figure>
<p><iframe title="Comet Tsuchinshan-ATLAS captured in amazing time-lapse from space" width="1170" height="658" src="https://www.youtube.com/embed/FPMMFIB9sjY?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p><figcaption><span class="caption">A view of comet Tsuchinshan-ATLAS from the International Space Station.</span></figcaption></figure>
<p>The second comet, <a href="https://theskylive.com/how-far-is-c2024a1">C/2024 S1 (ATLAS)</a>just discovered on September twenty seventh, needs to be visible around the top of October. The comet will make its closest approach to Earth on October twenty fourth &#8211; look deep into the eastern sky just before sunrise. Then, after orbiting the sun, the comet could reappear within the western night sky shortly before Halloween. However, it is feasible that every one or a part of it&#8217;s going to disintegrate, as sometimes happens when comets pass by the sun &#8211; and this one will come inside 1,000,000 miles (1.6 million kilometers) of our star.</p>
<p><a href="https://wray.eas.gatech.edu/">As a planetary astronomer</a>I&#39;m particularly interested by the Oort Cloud and the icy bodies that inhabit it. The inhabitants of the cloud might be a reason for the emergence of life on Earth; When these icy bodies crashed onto our planet eons ago, they might have provided supplies <a href="https://www.jpl.nasa.gov/news/comet-provides-new-clues-to-origins-of-earths-oceans/">a minimum of a number of the water</a> that every one life requires. At the identical time, these same objects pose an ever-present threat to the continued existence of the Earth &#8211; <a href="https://earthsky.org/space/younger-dryas-comet-burst-crashed-earths-climate/">and our survival</a>.</p>
<h2>billion comets</h2>
<p>When an Oort cloud object finds its way into the inner solar system, its ice evaporates. This process creates a tail of debris that becomes visible as a comet.</p>
<p>Some of those bodies, often known as <a href="https://astronomy.swin.edu.au/cosmos/l/Long-period+Comets">long-period comets</a>have orbits of a whole bunch, 1000&#8217;s and even tens of millions of years, like Tsuchinshan ATLAS. This is different from the so-called <a href="https://lco.global/spacebook/solar-system/comets-kuiper-belt-and-oort-cloud/#:%7E">short-period comets</a>which don&#8217;t visit the Oort cloud and have comparatively fast orbits. <a href="https://science.nasa.gov/solar-system/comets/1p-halley/">Halley&#39;s comet</a>One of those is planet Earth, which orbits the solar system and orbits the sun roughly every 76 years. </p>
<p>The twentieth century Dutch astronomer Jan Oort was fascinated by long-period comets and <a href="https://articles.adsabs.harvard.edu/pdf/1950BAN....11...91O">wrote a paper about it in 1950</a>. He found that about 20 of the comets had a mean distance of greater than 10,000 astronomical units from the Sun. That was amazing; Just one AU is the Earth&#39;s distance from the Sun <a href="https://science.nasa.gov/learning-resources/how-big-is-the-solar-system/">about 93 million miles</a>. Multiply 93 million by 10,000 and also you&#39;ll find that these comets come from over a trillion miles away. What&#39;s more, Oort says, they weren&#39;t necessarily the outermost objects within the cloud. </p>
<p>Almost 75 years after Oort&#39;s paper, astronomers still cannot directly image this a part of space. However, they estimate that the Oort Cloud extends as much as 10 trillion miles from the Sun, which is sort of half that <a href="https://earthsky.org/astronomy-essentials/proxima-centauri-our-suns-nearest-neighbor/">Next to Centauri</a>the closest star. </p>
<p>The long-period comets spend most of their time at these vast distances, making only short and quick visits near the Sun as they arrive from all directions. Oort speculated that the cloud contained 100 billion of those icy objects. There may be as many as these <a href="https://imagine.gsfc.nasa.gov/science/objects/milkyway1.html#:%7E">Number of stars in our galaxy</a>.</p>
<p>How did they get there? Oort suspected and modern simulations have confirmed that these icy bodies can have originally formed nearby <a href="https://science.nasa.gov/jupiter/">Jupiter, the most important planet within the solar system</a>. These objects&#39; orbits across the Sun can have been disrupted by Jupiter, much like what is usually the case with NASA spacecraft heading to destinations from Saturn to Pluto <a href="https://science.nasa.gov/learn/basics-of-space-flight/primer/">swung by the enormous planet</a> to hurry up their journey out. </p>
<p>Some of those objects would have permanently escaped the solar system and grow to be <a href="https://knowablemagazine.org/content/article/physical-world/2024/detect-interstellar-objects-oumuamua-borisov-clues-to-exoplanets">interstellar objects</a>. But others would have ended up with orbits like those of long-period comets.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:56.233421750663126%;--background-color:#314951"><img decoding="async" alt="An artistic illustration of the solar system and the Oort cloud." class="lazyload" src="https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=337&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=337&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=337&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=424&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=424&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/625040/original/file-20241010-15-us6m1c.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=424&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">An illustration of the solar system and the Oort cloud. The numbers within the graphic represent AUs, or astronomical units. Note the placement of Voyager 2, which is able to take one other 30,000 years to fly out of the cloud.</span><br />
              <span class="attribution"><a class="source" href="https://astrobiology.nasa.gov/news/revised-data-sets-for-oort-cloud-comets/">NASA</a></span><br />
            </figcaption></figure>
<h2>Threats to Earth</h2>
<p>Long-period comets <a href="https://doi.org/10.1016/j.jsse.2018.07.002">represent a selected potential threat to the Earth</a>. Because they&#8217;re thus far from our Sun, their orbits are easily altered by the gravity of other stars. This signifies that scientists do not know when or where any of those animals will appear until they suddenly do. At this point it is normally closer than Jupiter and moving quickly, at speeds of tens of 1000&#8217;s of miles per hour. In fact, the fictional comet that doomed Earth within the film is &#8220;<a href="https://www.imdb.com/title/tt11286314/">Don&#39;t look up</a>” <a href="https://www.syfy.com/dont-look-up-science-behind-planet-killer-comet">got here from the Oort cloud</a>.</p>
<p>New comets are continuously being discovered from the Oort Cloud, in recent times a couple of dozen per yr. The likelihood that considered one of them will collide with Earth is amazingly small. <a href="https://bigthink.com/starts-with-a-bang/largest-comet-earth/">But it is feasible</a>. The recent success of <a href="https://science.nasa.gov/mission/dart/">NASA&#39;s DART mission</a>that modified the orbit of a small asteroid shows a plausible approach to defending against these small bodies. But this mission was developed after years of studying its goal. A comet from the Oort cloud may not provide that much time &#8211; perhaps just months, weeks and even days. </p>
<p>Or no time in any respect. <a href="https://science.nasa.gov/solar-system/comets/oumuamua/">&#39;Oumuamua</a>The strange little object that visited our solar system in 2017 was discovered not before, but after its closest approach to Earth. Although &#39;Oumuamua is an interstellar object and doesn&#8217;t come from the Oort cloud, the suggestion still holds; One of those objects could sneak up on us and the Earth could be defenseless.</p>
<p>One approach to prepare for these objects is to raised understand their fundamental properties, including their size and composition. To this end, my colleagues and I are working on characterizing latest long-period comets. The largest known <a href="https://www.space.com/giant-comet-bernardinelli-bernstein-discovery-size-activity">Bernardinelli–Bernstein</a>discovered just three years ago, is about 75 miles (120 kilometers) in diameter. Most known comets are much smaller, from one to a number of miles, and a few smaller ones are too faint for us to see. But newer telescopes are helping. In particular, the decades-long Ruby Observatory <a href="https://kipac.stanford.edu/research/projects/vera-rubin-observatorys-legacy-survey-space-and-time">Legacy Overview of Space and Time</a>launching in 2025, could double the list of known Oort cloud comets, which currently stands at about 4,500. </p>
<p>The unpredictability of those objects makes them a difficult goal for spacecraft, however the European Space Agency is preparing a mission to do exactly that: <a href="https://www.cometinterceptor.space/">Comet interceptor</a>. With a launch planned for 2029, the probe will park in space until an acceptable goal emerges from the Oort cloud. Studying considered one of these ancient and pristine objects could provide scientists with clues concerning the origins of the solar system. </p>
<p>As for the comets which are now near Earth, it&#39;s okay to look up. Unlike the comet within the DiCaprio film, these two won&#8217;t crash into Earth. The closest Tsuchinshan ATLAS will reach us is about 44 million miles (70 million kilometers); C/2024 S1 (ATLAS), about 80 million miles (130 million kilometers). Sounds like an extended shot, but in space it&#39;s a near miss.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>Driver who stopped on Highway 84 and started throwing objects is fatally struck by one other automobile &#8211; The Mercury News</title>
		<link>https://bloggingthree.soflytech.com/2024/10/driver-who-stopped-on-highway-84-and-started-throwing-objects-is-fatally-struck-by-one-other-automobile-the-mercury-news/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Mon, 07 Oct 2024 21:29:20 +0000</pubDate>
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		<guid isPermaLink="false">https://bloggingthree.soflytech.com/?p=16836</guid>

					<description><![CDATA[FREMONT — A one that got out of his automobile early Sunday and started throwing objects at vehicles on State Route 84 was killed when he was struck by a automobile, the California Highway Patrol said. The deceased man&#39;s name was not immediately released pending notification of his family. The driver of the automobile that [&#8230;]]]></description>
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<p>FREMONT — A one that got out of his automobile early Sunday and started throwing objects at vehicles on State Route 84 was killed when he was struck by a automobile, the California Highway Patrol said.</p>
<p>The deceased man&#39;s name was not immediately released pending notification of his family.</p>
<p>The driver of the automobile that hit the person didn&#39;t notice the incident until he drove home and checked out footage on his dashboard camera, authorities said. After seeing the footage, the motive force contacted the CHP.</p>
<p>The fatal collision occurred around 5:41 a.m. Sunday on westbound State Route 84, east of Paseo Padre Parkway.</p>
<p>According to the CHP, the person killed had stopped his Tesla within the lane closest to the middle divider and walked to the world of ​​the middle divider before reentering lane number three. According to a passing motorist, he threw objects at vehicles before being struck and killed by a Dodge Challenger, the CHP said.</p>
<p>The Challenger continued driving, but debris from the vehicle was recovered from the scene, CHP Officer Kylie Musselman said. Some of the debris had part numbers and the CHP was in a position to trace it to the owner.</p>
<p>Musselman said CHP officers also viewed video that showed the person on the road holding something in his hand before he was hit.</p>
<p>The CHP remains to be trying to find out why the person who was killed stopped his vehicle and was throwing objects on the roadway.</p>
<p>Anyone with information is asked to call the CHP Hayward office at 510-489-1500.</p>
<p><iframe src="https://embed.bloom.li/article/map?zoom=far&#038;post_key=dK3BsZ6J8h9e5eHzj835" title="Story map" style="display:block;border:none;visibility:visible;width:100% !important;height:300px;"></iframe></p></div>
<p><em>image credit : www.mercurynews.com</em></p>
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		<title>Black holes are mysterious but additionally deceptively easy &#8211; a brand new space mission could help physicists answer thorny questions on these astronomical objects</title>
		<link>https://bloggingthree.soflytech.com/2024/05/black-holes-are-mysterious-but-additionally-deceptively-easy-a-brand-new-space-mission-could-help-physicists-answer-thorny-questions-on-these-astronomical-objects/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Thu, 16 May 2024 04:47:21 +0000</pubDate>
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		<guid isPermaLink="false">https://bloggingthree.soflytech.com/?p=3598</guid>

					<description><![CDATA[Physicists consider black holes to be one of the crucial mysterious objects in existence. Ironically, also they are considered considered one of the simplest. for years, Physicists like me have tried to prove that black holes are more complex than they appear. And a newly approved one European space mission called LISA will help us [&#8230;]]]></description>
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<p>Physicists consider black holes to be one of the crucial mysterious objects in existence.  Ironically, also they are considered considered one of the simplest.  for years, <a href="https://web.uri.edu/physics/meet/gaurav-khanna/">Physicists like me</a> have tried to prove that black holes are more complex than they appear.  And a newly approved one <a href="https://lisa.nasa.gov/">European space mission called LISA</a> will help us on this hunt.</p>
<p><a href="https://doi.org/10.1103/PhysRevLett.28.452">Research from the Nineteen Seventies</a> suggests that a black hole may be comprehensively described using just three physical attributes &#8211; its mass, charge and spin.  All other properties of those massive dying stars, comparable to their detailed composition, density and temperature profiles, disappear once they transform right into a black hole.  They are that straightforward. </p>
<p>The concept that black holes have only three properties known as the “no-hair” theorem and implies that they don&#8217;t have any “hairy” details that make them complicated. </p>
<figure>
<p><iframe title="Black Holes 101 | National Geographic" width="1170" height="658" src="https://www.youtube.com/embed/kOEDG3j1bjs?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p><figcaption><span class="caption">Black holes are huge, mysterious astronomical objects.</span></figcaption></figure>
<h2>Hairy black holes?</h2>
<p>For a long time, researchers within the astrophysics community have exploited loopholes or workarounds within the assumptions of the no-hair theorem to develop potential “hairy” scenarios for black holes.  A hairy black hole has a physical property that scientists can, in principle, measure that goes beyond its mass, charge or spin.  This property should be a everlasting a part of its structure. </p>
<p>About a decade ago, <a href="https://scholar.google.com/citations?user=PVRtJa0AAAAJ&#038;hl=en">Stefanos Aretakis</a>, a physicist currently working on the University of Toronto, showed mathematically that a black hole with the utmost charge it may hold &#8211; a so-called extremely charged black hole &#8211; would develop &#8220;hairs&#8221; on its horizon.  A <a href="https://www.britannica.com/topic/event-horizon-black-hole">Black hole horizon</a> is the boundary where anything that crosses it, not even light, can escape.</p>
<p>Aretakis&#39; evaluation was more of a thought experiment with a highly simplified physical scenario, so scientists don&#39;t expect to watch this astrophysically.  But charged black holes will not be the one type that would have hair. </p>
<p>Since astrophysical objects like stars and planets are known to rotate, scientists expect this to occur <a href="https://www.nasa.gov/image-article/how-measure-spin-of-black-hole/">Black holes would also rotate</a>based on their creation. <a href="https://physicsworld.com/a/m87s-precessing-jet-reveals-black-holes-fast-spin/">Astronomical evidence</a> has shown that black holes even have spin, although researchers don&#39;t know what the standard spin value is for an astrophysical black hole.  </p>
<p>Using computer simulations, my team recently&#8230; <a href="https://doi.org/10.1103/PhysRevResearch.1.033106">discovered similar hair types</a> in black holes rotating at maximum speed.  This hair has to do with the speed of change or gradient of the curvature of spacetime on the horizon.  We also found that a black hole doesn&#39;t necessarily must rotate to its maximum to have hairs, which is critical due to them <a href="https://doi.org/10.1086/152991">Maximum rotating black holes probably don&#8217;t form</a> in the character. </p>
<h2>Detect and measure hair</h2>
<p>My team desired to develop a approach to potentially measure this hair &#8211; a brand new solid property that would characterize a black hole beyond its mass, spin and charge.  We began to research how such a brand new property could leave a mark <a href="https://doi.org/10.1103/PhysRevD.103.L021502">Signature on a gravitational wave</a> emitted by a rapidly spinning black hole. </p>
<p>A <a href="https://www.ligo.caltech.edu/page/what-are-gw">Gravitational wave</a> is a tiny disturbance in spacetime typically attributable to violent astrophysical events within the universe.  The collisions of compact astrophysical objects comparable to black holes and neutron stars emit strong gravitational waves.  An international network of gravitational observatories, including the <a href="https://ligo.caltech.edu">Laser Interferometer Gravitational Wave Observatory</a> within the United States routinely detects these waves. </p>
<p>Our recent studies suggest that these hair-raising properties may be measured using gravitational wave data <a href="https://doi.org/10.1103/PhysRevD.105.044032">for rapidly rotating black holes</a>.  Looking on the gravitational wave data offers the potential for obtaining some type of signature that would indicate whether the black hole has such a hair. </p>
<p><a href="https://doi.org/10.48550/arXiv.2307.03963">Our ongoing studies</a> and up to date advances by Som Bishoyi, a student on the team, are based on a mixture of theoretical and computational models of rapidly rotating black holes.  Our results haven&#8217;t yet been tested in the sphere or observed in real black holes in space.  But we hope that may change soon.</p>
<h2>LISA gets the green light</h2>
<p>In January 2024, the European Space Agency officially adopted space-based technology <a href="https://www.esa.int/Science_Exploration/Space_Science/Capturing_the_ripples_of_spacetime_LISA_gets_go-ahead">Laser interferometer space antenna</a>, or LISA, mission.  LISA will seek for gravitational waves, and the mission&#39;s data could help my team with our difficult questions on the black hole. </p>
<figure class="align-center ">
<div class="placeholder-container" style="--aspect-ratio-percent:77.32095490716179%;--background-color:#1b1b33"><img decoding="async" alt="Three spacecraft spaced apart send beams of light toward each other as they orbit the sun" class="lazyload" src="https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=464&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=464&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=464&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=583&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=583&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/572159/original/file-20240130-15-gvz258.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=583&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">The LISA spacecraft observes gravitational waves from a distant source as they orbit the Sun.</span><br />
              <span class="attribution"><a class="source" href="https://www.aei.mpg.de/lisa">Simon Barke/Univ.  Florida</a>, <a class="license" href="http://creativecommons.org/licenses/by/4.0/">CC BY</a></span><br />
            </figcaption></figure>
<p>Formal acceptance signifies that the project <a href="https://www.esa.int/Science_Exploration/Space_Science/LISA_factsheet">has green light</a> move into the development phase, with a planned start in 2035. LISA consists of <a href="https://lisa.nasa.gov/">three spaceships</a> configured in an ideal equilateral triangle that goes across the sun behind the Earth.  The spaceships might be each <a href="https://www.esa.int/Science_Exploration/Space_Science/LISA_factsheet">1.6 million miles (2.5 million kilometers) apart</a>and they&#8217;re going to exchange laser beams to measure the gap between one another to an accuracy of a few billionth of an inch. </p>
<p>LISA will detect gravitational waves from supermassive black holes which are thousands and thousands and even billions of times more massive than our Sun.  It will create a map of space-time around rotating black holes that may help physicists understand with unprecedented precision how gravity acts within the immediate surroundings of black holes.  The physicists hope that LISA also can measure the difficult properties of black holes. </p>
<p>With <a href="https://doi.org/10.1038/d41586-023-01732-4">LIGO makes latest observations</a> on daily basis and LISA to offer insight into the spacetime surrounding black holes, now&#8217;s one of the crucial exciting times to be a black hole physicist.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>“Dancing” raisins – a straightforward kitchen experiment shows how objects can draw energy from their surroundings and are available to life</title>
		<link>https://bloggingthree.soflytech.com/2024/05/dancing-raisins-a-straightforward-kitchen-experiment-shows-how-objects-can-draw-energy-from-their-surroundings-and-are-available-to-life/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Mon, 13 May 2024 16:08:38 +0000</pubDate>
				<category><![CDATA[News]]></category>
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		<guid isPermaLink="false">https://bloggingthree.soflytech.com/?p=3359</guid>

					<description><![CDATA[Scientific discoveries don&#39;t at all times require a high-tech laboratory or an enormous budget. Many people have a first-class laboratory right at home &#8211; of their kitchen. The kitchen offers quite a few opportunities to view and explore what physicists call soft matter and sophisticated fluids. Everyday phenomena like Cheerios buildup in milk or rings [&#8230;]]]></description>
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<p>Scientific discoveries don&#39;t at all times require a high-tech laboratory or an enormous budget.  Many people have a first-class laboratory right at home &#8211; of their kitchen.</p>
<p>The kitchen offers quite a few opportunities to view and explore what physicists call soft matter and sophisticated fluids.  Everyday phenomena like Cheerios buildup in milk or rings left behind when coffee drops evaporate have led to this <a href="https://doi.org/10.1103/RevModPhys.95.025004">Discoveries on the interface of physics and chemistry</a> and other tasteful collaborations between <a href="https://sciencecooking.seas.harvard.edu/">Food scientist and physicist</a>.</p>
<p>Two students, Sam Christianson and Carsen Grote, and I published <a href="https://doi.org/10.1038/s41467-024-47672-z">a brand new study in Nature Communications</a> in May 2024, which deals with one other kitchen statement.  We&#39;ve been studying how objects can float in carbonated liquids, a phenomenon whimsically called &#8220;dancing raisins.&#8221; </p>
<p>The study examined how objects like raisins can move rhythmically up and down in carbonated liquids for several minutes, even as much as an hour.</p>
<p>An accompanying one <a href="https://x.com/SaverioIV/status/1701996622425514473">Twitter thread about our research</a> went viral, garnering over half 1,000,000 views in only two days.  Why has this particular experiment captured the imagination of so many individuals?</p>
<h2>Bubbling physics</h2>
<p>Mineral water and other carbonated drinks fizz with bubbles because they contain more gas than the liquid can hold &#8211; they&#8217;re &#8220;supersaturated&#8221; with gas.  If you <a href="https://press.princeton.edu/books/hardcover/9780691158723/uncorked">Open a bottle of champagne</a> or a soft drink, the liquid pressure drops and CO₂ molecules begin to flee into the encompassing air. </p>
<p>Bubbles don&#8217;t normally form spontaneously in a liquid.  A liquid is made up of molecules that wish to stick together, so the molecules on the liquid boundary are somewhat unhappy.  That results in <a href="https://link.springer.com/book/10.1007/978-0-387-21656-0">Surface tension</a>, a force aimed toward reducing surface area.  Because bubbles increase the surface area, surface tension and fluid pressure normally immediately displace any bubbles that form.</p>
<p>But rough spots on a container&#39;s surface, just like the engravings in some champagne glasses, can protect recent bubbles from the crushing effects of surface tension, giving them a likelihood to form and grow. </p>
<p>Bubbles also form within the microscopic, tubular fabric fibers which can be left behind once you wipe a glass with a towel. <a href="https://doi.org/10.1140/epjst/e2012-01528-0">The bubbles grow continuously in these tubes</a> Once large enough, they detach and float upwards, expelling gas from the container.</p>
<p>But as many Champagne enthusiasts who add fruit to their glasses know, surface etching and small fabric fibers aren&#39;t the one places where bubbles can form.  Add a small item like a raisin <a href="https://royalsocietypublishing.org/doi/full/10.1098/rsos.230376">or a peanut</a> to a sparkling drink also enables bubble growth.  These submerged objects function tantalizing recent surfaces on which opportunistic molecules like CO₂ can accumulate and form bubbles. </p>
<p>And once enough bubbles have grown on the item, an act of levitation may be performed.  Together, the bubbles can lift the item to the surface of the liquid.  Once the bubbles reach the surface, they burst and cause the item to fall back down.  Then the method begins again, in a periodic vertical dance movement.</p>
<h2>Dancing raisins</h2>
<p>Raisins are particularly good dancers.  It only takes a couple of seconds for enough bubbles to form on the wrinkled surface of a raisin before it begins to rise to the highest &#8211; bubble formation is tougher on smoother surfaces.  If a raisin is dipped in just-opened mineral water, it may possibly dance a vigorous tango for 20 minutes after which a slower waltz for one more hour or so. </p>
<figure>
<p><iframe title="Dancing Raisins(Chemistry)" width="1170" height="658" src="https://www.youtube.com/embed/frY3VyMoYbo?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p><figcaption><span class="caption">Anyone with a couple of kitchen staples can conduct their very own experiment with dancing raisins.</span></figcaption></figure>
<p>We found that rotation or rotation is crucial <a href="https://www.nature.com/articles/s41467-024-47672-z">make large objects dance</a>.  Bubbles that cling to the underside of an object can keep it aloft even when the highest bubbles pop.  But when the item begins to rotate even a little bit, the bubbles underneath rotate the body even faster, causing much more bubbles to burst on the surface.  And the earlier these bubbles are removed, the earlier the item can return to its vertical dance. </p>
<p>Small objects like raisins don&#39;t spin as much as larger objects, but as an alternative spin and wiggle forwards and backwards quickly.</p>
<h2>Modeling the bubbly flamenco</h2>
<p>In the work, we developed a mathematical model to predict how often an object like a raisin would come to the surface.  In one experiment, we placed a 3D printed ball that acted as a model of a raisin in a glass of just-opened mineral water.  The ball traveled up from the underside of the container <a href="https://doi.org/10.1038/s41467-024-47672-z">over 750 times in an hour</a>. </p>
<p><a href="https://doi.org/10.1038/s41467-024-47672-z">The model installed</a> the speed of bubble growth in addition to the form, size and surface roughness of the item.  This also took into consideration how quickly the liquid loses carbon dioxide resulting from the container geometry and specifically the flow generated by the bubbling activity. </p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:105.17241379310344%;--background-color:#a1705a"><img decoding="async" alt="Small bubble-covered objects in carbonated water move up to the surface and back down." class="lazyload" src="https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=631&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=631&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=631&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=793&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=793&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/593002/original/file-20240508-22-qh21ch.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=793&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Bubble-covered raisins “dance” to the surface and fall as soon as their lifting devices are ruptured.</span><br />
              <span class="attribution"><span class="source">Saverio spagnolia</span></span><br />
            </figcaption></figure>
<p>Using the mathematical model, we were in a position to determine which forces had the best influence on the item&#39;s dance.  For example, the fluid resistance on the item turned out to be relatively unimportant, however the ratio of the item&#39;s surface area to its volume was crucial.</p>
<p>Looking forward, the model also provides a method to determine some difficult-to-measure quantities using simpler measurable quantities.  For example, just by observing the dance frequency of an object, we will learn rather a lot about its surface at a microscopic level without having to directly see these details. </p>
<h2>Different dances in numerous theaters</h2>
<p>However, these results will not be only interesting for lovers of carbonated drinks.  There are also supersaturated liquids in nature &#8211; for instance magma. </p>
<p>As magma in a volcano rises closer to the Earth&#39;s surface, the pressure drops rapidly and dissolved gases from contained in the volcano rush toward the exit, identical to the CO₂ in carbonated water.  These escaping gases can form into large high-pressure bubbles and emerge with such force that a <a href="https://www.youtube.com/watch?v=LQwZwKS9RPs&#038;ab_channel=TED-Ed">a volcanic eruption occurs</a>. </p>
<p>The particles in magma may not dance in the identical way as raisins in soda water, but tiny objects within the magma can influence the progression of those explosive events. </p>
<p>In recent many years there has also been an outbreak of a special kind: hundreds of scientific studies have been dedicated to lively matter in liquids.  These studies have a look at things like <a href="https://www.youtube.com/@journeytomicro/videos">floating microorganisms</a> and that <a href="https://xvivo.com/examples/the-inner-life-of-the-cell/">The within our fluid-filled cells</a>. </p>
<p>Most of those lively systems exist not in water, but in additional complicated biological fluids that contain the energy needed to supply activity.  Microorganisms absorb nutrients from the fluid around them with a purpose to proceed swimming.  Molecular motors move cargo along a highway inside our cells by drawing energy from the environment <a href="https://www.ncbi.nlm.nih.gov/books/NBK26888/">in the shape of ATP</a> from the encompassing area. </p>
<p>Studying these systems can assist scientists learn more about how the cells and bacteria within the human body function and the way life on this planet evolved to its current state.</p>
<p>Meanwhile, a liquid itself can behave strangely resulting from the difference in molecular composition and the bodies moving inside it. <a href="https://doi.org/10.1146/annurev-conmatphys-040821-112149">Many recent studies</a> for instance, have checked out the behavior of microorganisms in liquids equivalent to mucus, which behaves each like a viscous liquid and an elastic gel.  Scientists still have rather a lot to study these highly complex systems. </p>
<p>While raisins in soda water seem quite easy in comparison with microorganisms floating through biological fluids, they supply an accessible method to study generic traits in these more difficult environments.  In each cases, bodies extract energy from their complex fluid environments and concurrently influence them, resulting in fascinating behaviors. </p>
<p>New insights into the physical world, from geophysics to biology, will proceed to emerge from table-scale experiments—and maybe right within the kitchen.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>How First Nations artists reclaim colonial objects and have fun culture through garments</title>
		<link>https://bloggingthree.soflytech.com/2024/04/how-first-nations-artists-reclaim-colonial-objects-and-have-fun-culture-through-garments/</link>
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		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Mon, 29 Apr 2024 20:06:41 +0000</pubDate>
				<category><![CDATA[Fashion & Style]]></category>
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		<category><![CDATA[celebrate]]></category>
		<category><![CDATA[colonial]]></category>
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					<description><![CDATA[I began collecting a number of years ago Vintage Australian tourist scarves that portray First Nations people as primitive caricatures and noble savages. I now own greater than ten scarves with images starting from Western depictions of First Nations art and objects to Indigenous peoples in symbolic scenes. Collecting these tourist goods just isn&#8217;t recent. [&#8230;]]]></description>
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<p>I began collecting a number of years ago <a href="https://collection.powerhouse.com.au/object/387828">Vintage Australian tourist scarves</a> that portray First Nations people as primitive caricatures and noble savages.  I now own greater than ten scarves with images starting from Western depictions of First Nations art and objects to Indigenous peoples in symbolic scenes.</p>
<p>Collecting these tourist goods just isn&#8217;t recent.  Kitsch items are sometimes collected and reclaimed by indigenous people, artists, designers and academics.</p>
<p>My fascination with kitsch scarves is wearing them as outfits, which I recently did in Darwin <a href="https://www.ifp.org.au/events/country-to-couture/">From country to couture</a> catwalk show. </p>
<figure class="align-right zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:122.78481012658229%;--background-color:#544931"><img decoding="async" alt="" class="lazyload" src="https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=237&#038;fit=clip" srcset="https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=736&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=736&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=736&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=925&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=925&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/573946/original/file-20240207-32-6mio03.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=925&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">As a creative response to my academic work, I wore one among my kitsch scarves to a fashion show.</span><br />
              <span class="attribution"><span class="source">Train Clark</span></span><br />
            </figcaption></figure>
<p>I did this as a creative response to my academic work on First Nations fashion, art and magnificence and to have interaction with the practice of First Nations dress &#8211; using clothing and jewellery as art.</p>
<h2>Aboriginalia and Koori kitsch</h2>
<p>Artists similar to Destiny Deacon and Tony Albert use multiple names to explain items with Western depictions of First Nations people, art and objects, including Koori Kitsch and Aboriginalia. </p>
<p>These depictions could be present in souvenirs and knickknacks in the shape of tea towels, tablecloths, postcards, ashtrays, dolls, scarves, badges and patches.</p>
<p>Destiny Deacon (KuKu/Erub/Mer) has been using Koori kitsch objects for a long time.  In a piece entitled <a href="https://www.ngv.vic.gov.au/explore/collection/work/146112/">Border Patrol (2006)</a>Deacon photographs a white doll on a tea towel with Australian landmarks, plants, animals and hunting Aborigines. </p>
<figure class="align-center ">
<div class="placeholder-container" style="--aspect-ratio-percent:80.23872679045093%;--background-color:#5aa8a4"><img decoding="async" alt="" class="lazyload" src="https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=481&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=481&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=481&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=605&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=605&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/570275/original/file-20240119-27-mkg6j4.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=605&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Destiny Deacon, Border Patrol (2006), from the Totemistical series.  Light jet print from the Polaroid original.  80cmx100cm.  Edition of 8 + 2 APs.</span><br />
              <span class="attribution"><span class="source">Roslyn Oxley9 gallery</span></span><br />
            </figcaption></figure>
<p>Tony Albert&#39;s (Girramay/Yidinji/Kuku-Yalanji) art often includes vintage souvenir ashtrays and textiles.  Albert is credited with coining the term &#8220;<a href="https://www.artgallery.nsw.gov.au/prizes/archibald/2017/29819/">Aborigines</a>“to explain the portrayal of Western stereotypes about First Nations peoples and cultures in kitsch articles.</p>
<p><a href="https://kaitjames.com/work.html">Kait James</a> (Wadawurrung) has decolonized vintage souvenir towels through embroidered embellishments to focus on their problematic designs and reclaim them as First Nations art.  James also recently revolutionized the Barbie doll by making a custom-made Aboriginal flag dress and a banner reading &#8220;Faboriginal Barbie.&#8221;</p>
<p>In the 2022 exhibition by Kayla Dickens (Wiradjuri) <a href="https://www.abc.net.au/news/2022-01-26/karla-dickens-interview-return-to-sender-carriageworks/100780016">Return to sender</a>The collage backgrounds featured enlarged vintage postcards with superimposed images, symbols, and texts that addressed colonization and colonial-style sexual exploitation.</p>
<h2>First Nations clothing</h2>
<p>The natives also use Aboriginalia in fashion.  Paul McCann (Marrithiyel) has embellished couture outfits with vintage textiles depicting First Nations peoples, animals and plants. </p>
<p>One of McCann&#39;s designs for Australian Fashion Week 2022, &#8220;Blinged Out Warrior,&#8221; disrupted a kitschy Aboriginal man&#39;s garment by placing it front and center on an iridescent top.  This form of labor, called “<a href="https://madmuseum.org/exhibition/garmenting-costume-contemporary-art">clothing</a>“, emphasizes the use of up to date artists’ clothing of their pieces.</p>
<p>While “Aboriginal” and “Koori kitsch” are popular terms, First Nations clothing is a more moderen definition that has not yet entered the mainstream.  It is an emerging trend being adopted by many First Nations artists whose work is focused on engaging with or reimagining history, highlighting the present world or imagining a brand new future. </p>
<p>This could involve creating modern versions of traditional garments or critiquing and responding to colonial clothing that was imposed on indigenous people.  Several artists also create works that reflect contemporary protest clothing, or futuristic pieces that represent fantasies or predict trends.</p>
<p>Peter Waples-Crowes (Ngarigo) <a href="https://citymag.indaily.com.au/culture/partnership-culture/feeling-proud-with-peter-waples-crowe/">Ngarigo Queen – Cloak of Queer Visibility</a> (2018) contains a reworked possum skin cape with rainbow colours and a train to point his dual identities as Aboriginal and queer.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:133.28912466843502%;--background-color:#49382e"><img decoding="async" alt="" class="lazyload" src="https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=800&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=800&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=800&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=1005&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=1005&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/570277/original/file-20240119-17-h9msg5.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=1005&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Peter Waples-Crowe, Ngarigo Queen – Cloak of Queer Visibility (2018).</span><br />
              <span class="attribution"><span class="source">Train Clark</span></span><br />
            </figcaption></figure>
<p>Kelly Koumalatsos (Wergaia/Wemba Wemba) uses possum fur as a stamp to create cultural fabrics.  Significant works use these fabrics to create colonial and western outfits paying homage to colonization. </p>
<p>When exhibiting her garments in galleries, Koumalatsos also includes old family portraits within the works to further contextualize the forced colonial clothing.</p>
<p><a href="https://www.nsmithgallery.com/artists/53-kyra-mancktelow/overview/">Kyra Mancktelow</a> (Quandamooka) focuses on producing garments in sculptural or printed form to interrogate the colonial history of forced Western clothing and the removal of cultural clothing.  The items she recreates range from forced military jackets to outfits worn on missions to contemporary shapes that reference the history of activism.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:74.93368700265252%;--background-color:#9b6b5f"><img decoding="async" alt="" class="lazyload" src="https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=450&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=450&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=450&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/570278/original/file-20240119-19-d3dtbi.jpg?ixlib=rb-1.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=565&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Kyra Mancktelow, Gubba Up, 2021–22.  Two ink prints with gold leaf on Hahnemühle paper, each 140 cm x 92 cm.</span><br />
              <span class="attribution"><a class="source" href="https://www.nsmithgallery.com/exhibitions/119-kyra-mancktelow-gubba-up.-n.smith-gallery/overview/">Courtesy of the artist and N.Smith Gallery, Sydney.</a></span><br />
            </figcaption></figure>
<p>Carly Tarkari Dodds (Kaurna/Narungga/Ngarrindjeri) exhibition, <a href="https://www.mutualart.com/Exhibition/Carly-Tarkari-Dodd--Royal-Jewels/4CA24E4E9971C35E">Royal Jewels</a> (2022) presented indigenous versions of jewellery belonging to the English royal family.  Using cultural weaving techniques to recreate the English monarch&#39;s jewelry collection, Dodd confronts colonization by turning the tables and inspiring the truthful telling of this land&#39;s story. </p>
<p>The artist <a href="https://www.charlotteallingham.com/">Coffin birth</a> (Charlotte Allingham, Wiradjuri/Ngiyampaa) illustrates designs depicting indigenous people in unique outfits throughout time.  Coffinbirth specifically depicts or recreates First Nations culture or themes through popular culture graphics and comic-book style art.</p>
<p>Dennis Golding (Kamilaroi/Gamilaraay) <a href="https://nit.com.au/15-01-2024/9303/dennis-golding-offers-lessons-in-finding-power-and-pride-with-new-the-future-is-here-exhibition">creates hand-painted superhero capes</a> to have fun the facility of First Nations identity.  He often works with First Nations young people to develop their very own versions.</p>
<h2>Disrupt, Reclaim and Indigenize</h2>
<p>Many First Nations people have an innate have to dispel harmful narratives and creatively channel cultural practices.</p>
<p>This could be through artists exhibiting their work, fashion designers telling their stories, or on a regular basis First Nations individuals who enjoy practicing culture through outfits.  When First Nations artists use colonial souvenirs and clothing, they will disrupt colonization and have fun their culture.</p>
<p>Wearing my kitsch scarves signifies that I&#8217;m joining a distinguished group of First Nations artists who use these objects and clothing of their works and inventive expressions.</p>
<hr>
<hr></div>
<p><em>image credit : theconversation.com</em></p>
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		<title>IceCube researchers discover a rare form of high-energy neutrinos emitted by powerful astronomical objects</title>
		<link>https://bloggingthree.soflytech.com/2024/04/icecube-researchers-discover-a-rare-form-of-high-energy-neutrinos-emitted-by-powerful-astronomical-objects/</link>
					<comments>https://bloggingthree.soflytech.com/2024/04/icecube-researchers-discover-a-rare-form-of-high-energy-neutrinos-emitted-by-powerful-astronomical-objects/#respond</comments>
		
		<dc:creator><![CDATA[enzo2go]]></dc:creator>
		<pubDate>Sat, 27 Apr 2024 11:36:38 +0000</pubDate>
				<category><![CDATA[Technology]]></category>
		<category><![CDATA[astronomical]]></category>
		<category><![CDATA[discover]]></category>
		<category><![CDATA[emitted]]></category>
		<category><![CDATA[highenergy]]></category>
		<category><![CDATA[IceCube]]></category>
		<category><![CDATA[neutrinos]]></category>
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		<category><![CDATA[powerful]]></category>
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					<description><![CDATA[About a trillion tiny particles called neutrinos go through us every second. These “relic” neutrinos, created through the Big Bang, exist throughout the universe but cannot harm you. In fact, only one among them is prone to frivolously touch an atom in your body over the course of your life. Most neutrinos produced by objects [&#8230;]]]></description>
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<p>About a trillion tiny particles called neutrinos go through us every second.  These “relic” neutrinos, created through the Big Bang, exist throughout the universe but cannot harm you.  In fact, only one among them is prone to frivolously touch an atom in your body over the course of your life.</p>
<p>Most neutrinos produced by objects <a href="https://science.nasa.gov/universe/black-holes/">similar to black holes</a> have rather more energy than the relic neutrinos floating through space.  Although these high-energy neutrinos are much rarer, they usually tend to crash into something and produce a signal <a href="https://science.psu.edu/physics/people/doug-cowen">Physicists like me</a> can recognize.  But to detect them, neutrino physicists had to establish very large experiments. </p>
<p><a href="https://icecube.wisc.edu/">Ice cubes</a>one such experiment documented a very rare form of particularly high-energy astrophysical neutrinos in <a href="https://doi.org/10.1103/PhysRevLett.132.151001">a study published in April 2024</a>.  These high-energy neutrinos often disguise themselves as other, more common forms of neutrinos.  But for the primary time, my colleagues and I managed to find them, pulling some from nearly a decade of knowledge. </p>
<p>Their presence brings researchers like me one step closer to solving the mystery of how high-energy particles like astrophysical neutrinos are formed in the primary place.</p>
<h2>IceCube Observatory</h2>
<p>The <a href="https://icecube.wisc.edu/">IceCube Neutrino Observatory</a> is the 800-pound gorilla of the massive neutrino experiments.  It has <a href="https://icecube.wisc.edu/about-us/facts/">around 5,000 sensors</a> who&#8217;ve been looking intently at a gigaton of ice beneath the South Pole for over a decade.  When a neutrino collides with an atom within the ice, it creates a ball of sunshine that the sensors record.</p>
<figure>
<p><iframe title="IceCube high-energy astrophysical neutrinos" width="1170" height="658" src="https://www.youtube.com/embed/2DDQYHIbL3Q?feature=oembed" frameborder="0" allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share" referrerpolicy="strict-origin-when-cross-origin" allowfullscreen></iframe></p><figcaption><span class="caption">As neutrinos move through IceCube, a tiny fraction of them interact with atoms within the ice, producing light that the sensors record.  In the video, the spheres represent individual sensors, with the dimensions of every sphere proportional to how much light it detects.  The colours indicate the relative arrival time of sunshine in line with the colours of the rainbow, with red arriving earliest and violet arriving latest.</span></figcaption></figure>
<p>IceCube has discovered neutrinos that were created in several places, for instance on <a href="https://icecube.wisc.edu/news/research/2014/10/atmospheric-neutrino-oscillations-measured-with-three-years-of-icecube-data/">Earth&#39;s atmosphere</a>the middle of the Milky Way and black holes in other galaxies many light years away. </p>
<p>But the tau neutrino, a form of particularly high-energy neutrino, has to this point eluded IceCube.</p>
<h2>Neutrino flavors</h2>
<p>Neutrinos are available in <a href="https://neutrinos.fnal.gov/types/flavor/">three differing kinds</a>, which physicists call aromas.  Each flavor leaves a singular impression on a detector like IceCube.</p>
<p>Typically, when a neutrino collides with one other particle, it produces a charged particle that matches its flavor.  A muon neutrino creates a muon, an electron neutrino creates an electron, and a tau neutrino creates a tau.</p>
<p>Muon-flavored neutrinos have essentially the most distinctive signature, so naturally my colleagues and I within the IceCube collaboration searched for these first.  The muon emitted in a muon-neutrino collision travels through a whole bunch of meters of ice, leaving a protracted trail of detectable light before decaying.  This track allows researchers to trace the origin of the neutrino. </p>
<p>Next, the team examined electron neutrinos, whose interactions produce a roughly spherical ball of sunshine.  The electron created by an electron-neutrino collision never decays and strikes any particle within the ice that it comes near.  This interaction <a href="https://icecube.wisc.edu/science/icecube/">leaves an expanding ball of sunshine</a> in its wake before the electron finally involves rest. </p>
<p>Since the direction of the electron neutrino could be very difficult to see with the naked eye, the IceCube physicists made the choice <a href="https://www.sciencedirect.com/topics/computer-science/machine-learning">Machine learning techniques</a> to indicate where the electron neutrinos may need originated.  These techniques use sophisticated computational resources and tune tens of millions of parameters to separate neutrino signals from all known backgrounds.</p>
<p>The third form of neutrino, the tau neutrino, is the chameleon of the trio.  One tau neutrino can appear as a trail of sunshine, while the subsequent can appear as a sphere.  The tau particle created within the collision moves for a tiny fraction of a second before decaying, and when it decays it normally creates a ball of sunshine. </p>
<p>These tau neutrinos <a href="https://icecube.wisc.edu/news/research/2024/03/icecube-observes-seven-astrophysical-tau-neutrino-candidates/">Create two balls of sunshine</a>, one where they first bump into something and create a rope, and one where the rope itself disintegrates.  The tau particle normally decays after a really short distance, causing the 2 balls of sunshine to overlap a lot that they&#8217;ll not be distinguished from a single ball. </p>
<p>But at higher energies, the emitted tau particle can travel tens of meters, leading to two separate spheres of sunshine.  Physicists armed with these machine learning techniques can see through this and find the needle within the haystack.</p>
<h2>Energetic tau neutrinos</h2>
<p>Using these computational tools, the team managed to extract seven strong tau neutrino candidates from about ten years of knowledge.  These Taus had higher energies than even essentially the most powerful particle accelerators on Earth, meaning they should have come from astrophysical sources similar to black holes. </p>
<p>These data confirm IceCube&#39;s earlier discovery of astrophysical neutrinos. <a href="https://icecube.wisc.edu/news/research/2023/01/icecube-reports-first-detection-of-candidate-astrophysical-tau-neutrinos/">and so they confirm a clue</a> that IceCube previously detected astrophysical tau neutrinos. </p>
<p>These results also suggest that even at the very best energies and over long distances <a href="https://doi.org/10.1103/PhysRevLett.132.151001">Neutrinos behave similarly</a> as they do at lower energies.</p>
<p>In particular, the detection of astrophysical tau neutrinos confirms that energetic neutrinos come from distant sources <a href="https://neutrinos.fnal.gov/faq/what-are-neutrino-oscillations/">Change or oscillate flavor</a>.  Much lower energy neutrinos that travel much shorter distances also oscillate in the identical way.</p>
<figure class="align-center zoomable">
<div class="placeholder-container" style="--aspect-ratio-percent:83.95225464190982%;--background-color:#4e2d4b"><img decoding="async" alt="An artist&#39;s impression of a black hole attracting a spherical object." class="lazyload" src="https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;fit=clip" srcset="https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=600&#038;h=503&#038;fit=crop&#038;dpr=1 600w, https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=600&#038;h=503&#038;fit=crop&#038;dpr=2 1200w, https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=600&#038;h=503&#038;fit=crop&#038;dpr=3 1800w, https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=45&#038;auto=format&#038;w=754&#038;h=633&#038;fit=crop&#038;dpr=1 754w, https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=30&#038;auto=format&#038;w=754&#038;h=633&#038;fit=crop&#038;dpr=2 1508w, https://images.theconversation.com/files/589266/original/file-20240419-18-wk3f8z.jpg?ixlib=rb-4.1.0&#038;q=15&#038;auto=format&#038;w=754&#038;h=633&#038;fit=crop&#038;dpr=3 2262w" sizes="(min-width: 1466px) 754px, (max-width: 599px) 100vw, (min-width: 600px) 600px, 237px"></div><figcaption>
              <span class="caption">Black holes just like the one on this figure can emit high-energy neutrinos.</span><br />
              <span class="attribution"><a class="source" href="https://newsroom.ap.org/detail/HungryBlackHole/4cd9b7c1c318427ba2f3b78c77cfe6de/photo?Query=black%20hole&#038;mediaType=photo&#038;sortBy=&#038;dateRange=Anytime&#038;totalCount=464&#038;digitizationType=Digitized&#038;currentItemNo=8&#038;vs=true&#038;vs=true">NASA/Chandra X-ray Observatory/M.Weiss via AP</a></span><br />
            </figcaption></figure>
<p>As IceCube and other neutrino experiments collect more data and scientists improve at distinguishing the three neutrino variants, researchers will eventually find a way to guess how neutrinos are created from black holes.  We also want to seek out out whether the space between Earth and these distant astrophysical neutrino accelerators <a href="https://icecube.wisc.edu/news/research/2022/10/icecube-probes-for-quantum-gravity-using-astrophysical-neutrino-flavors/">treats particles in another way depending on their mass</a>.</p>
<p>Compared to the more abundant neutrinos originating from the Big Bang, there will likely be fewer and fewer high-energy tau neutrinos and their muon and electron cousins.  But there are enough of them to assist scientists like me seek for essentially the most powerful neutrino emitters within the universe and explore the limitless space in between.</p>
</p></div>
<p><em>image credit : theconversation.com</em></p>
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