{"id":545304,"date":"2023-01-29T17:20:01","date_gmt":"2023-01-29T14:20:01","guid":{"rendered":"https:\/\/en.buradabiliyorum.com\/how-three-dust-specks-reveal-an-asteroids-secrets\/"},"modified":"2023-01-29T17:20:01","modified_gmt":"2023-01-29T14:20:01","slug":"how-three-dust-specks-reveal-an-asteroids-secrets","status":"publish","type":"post","link":"https:\/\/buradabiliyorum.com\/en\/how-three-dust-specks-reveal-an-asteroids-secrets\/","title":{"rendered":"#How three dust specks reveal an asteroid&#8217;s secrets"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a2884bf82f92\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #dd3333;color:#dd3333\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #dd3333;color:#dd3333\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a2884bf82f92\" checked aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-1'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/buradabiliyorum.com\/en\/how-three-dust-specks-reveal-an-asteroids-secrets\/#%E2%80%9CHow_three_dust_specks_reveal_an_asteroids_secrets%E2%80%9D\" >&#8220;How three dust specks reveal an asteroid&#8217;s secrets&#8221;<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E2%80%9CHow_three_dust_specks_reveal_an_asteroids_secrets%E2%80%9D\"><\/span>&#8220;How three dust specks reveal an asteroid&#8217;s secrets&#8221;<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<div>\n<div class=\"article-gallery lightGallery\">\n<div data-thumb=\"https:\/\/scx1.b-cdn.net\/csz\/news\/tmb\/2023\/samples-from-itokawa-a.jpg\" data-src=\"https:\/\/scx2.b-cdn.net\/gfx\/news\/2023\/samples-from-itokawa-a.jpg\" data-sub-html=\"Samples from Itokawa arrived back on Earth in 2010 after being collected by the Hayabusa probe.\">\n<figure class=\"article-img\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/scx1.b-cdn.net\/csz\/news\/800a\/2023\/samples-from-itokawa-a.jpg\" alt=\"Samples from Itokawa arrived back on Earth in 2010 after being collected by the Hayabusa probe\" title=\"Samples from Itokawa arrived back on Earth in 2010 after being collected by the Hayabusa probe.\" width=\"800\" height=\"530\"\/><figcaption class=\"text-darken text-low-up text-truncate-js text-truncate mt-3\">\n                Samples from Itokawa arrived back on Earth in 2010 after being collected by the Hayabusa probe.<br \/>\n            <\/figcaption><\/figure>\n<\/div>\n<\/div>\n<p>The specks are tiny. No, really tiny. Smaller than the diameter of a hair. But they hold billions of years of history that reveal some of the secrets of asteroids.<\/p>\n<section class=\"article-banner first-banner ads-336x280\"><!-- \/4988204\/Phys_Story_InText_Box --><br \/>\n      <\/section>\n<p>The three minute particles from an asteroid called Itokawa show some of these space rocks are vastly older than was thought, and are much tougher.<\/p>\n<p>And that could mean we need bolder ways to prevent catastrophic collisions with Earth, according to research published Tuesday.<\/p>\n<p>The three samples were collected in 2005 from the peanut-shaped Itokawa, some 300 million kilometers (186 million miles) from Earth.<\/p>\n<p>It took the Japanese spacecraft Hayabusa five years to return them to Earth, along with hundreds of other particles from Itokawa, and scientists have been analyzing them for clues ever since.<\/p>\n<p>Fred Jourdan, professor at Curtin University&#8217;s School of Earth and Planetary <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/sciencee\/\" data-internallinksmanager029f6b8e52c=\"5\" title=\"Science\" target=\"_blank\" rel=\"noopener\">Science<\/a>s, wanted to see what the specks could reveal about the age of rubble-pile asteroids like Itokawa.<\/p>\n<p>These form when solid asteroids collide and the resulting fragments assemble into new structures.<\/p>\n<p>Solid asteroids are thought to have a lifespan of several hundred million years, and are gradually ground down by constant collisions.<\/p>\n<p>But rubble-pile asteroids have a very different structure, composed of rocks, dust, pebbles and a void, and held together by the gravitational pull of their various components.<\/p>\n<p>&#8220;It&#8217;s like a giant space cushion, and cushions are good at absorbing shock,&#8221; Jourdan said.<\/p>\n<p>To find out just how good, the team analyzed crystal structures in the samples, looking for deformations caused by the impact that created Itokawa.<\/p>\n<p>And they dated the samples by measuring the decay of potassium into argon.<\/p>\n<p>The methods suggest Itokawa was formed by an asteroid collision at least 4.2 billion years ago, ten times older than solid asteroids of similar size are predicted to be.<\/p>\n<p>&#8220;We were really surprised,&#8221; said Jourdan.<\/p>\n<p>&#8220;I mean that&#8217;s really, really old, and I&#8217;m sure some of my colleagues are not even going to believe it.&#8221;<\/p>\n<p>Rubble-pile asteroids are so resilient to the constant battering they face that they are likely to be much more abundant than previously assumed, the research published in the journal <i>Proceedings of the National Academy of Sciences<\/i> concludes.<\/p>\n<p>That might mean we need new ways to tackle such asteroids on a collision course with Earth, Jourdan said.<\/p>\n<p>NASA&#8217;s recent DART test showed asteroids like Itokawa can be nudged off course, but that would likely require a lead time of several years.<\/p>\n<p>An asteroid just weeks from colliding with Earth would require a different <a href=\"https:\/\/buradabiliyorum.com\/en\/category\/download-scripts-themes-apps\/\" data-internallinksmanager029f6b8e52c=\"9\" title=\"Download Scripts &amp; Themes &amp; Apps\" target=\"_blank\" rel=\"noopener\">app<\/a>roach, and Jourdan argues a nuclear blast might be needed.<\/p>\n<p>&#8220;It&#8217;s not &#8216;Armageddon&#8217;-style,&#8221; blowing it up, he hastens to add, referring to the 1998 sci-fi movie.<\/p>\n<p>&#8220;The shockwave should push the asteroid out of the way.&#8221;<\/p>\n<p>It is a far-reaching conclusion to draw from such tiny specks of dust, but each particle is analyzed at the atomic level.<\/p>\n<p>&#8220;We can get big stories like that out of (something) very, very small, because those machines, what they&#8217;re doing, is the measuring and counting of atoms,&#8221; Jourdan said.<\/p>\n<p>&#8220;Every grain has its own story to tell.&#8221;<\/p>\n<div class=\"article-main__more p-4\">\n                                                                                        <strong>More information:<\/strong><br \/>\n                                                Jourdan, Fred, Rubble pile asteroids are forever, <i>Proceedings of the National Academy of Sciences<\/i> (2023).  <a rel=\"nofollow noopener\" target=\"_blank\" data-doi=\"1\" href=\"https:\/\/dx.doi.org\/10.1073\/pnas.2214353120\">DOI: 10.1073\/pnas.2214353120<\/a>.<\/p><\/div>\n<p class=\"article-main__note mt-4\">\n                                                  \u00a9 2023 AFP<\/p>\n<p>                                        <!-- print only --><\/p>\n<div class=\"d-none d-print-block\">\n<p>                                                <strong>Citation<\/strong>:<br \/>\n                                                How three dust specks reveal an asteroid&#8217;s secrets (2023, January 29)<br \/>\n                                                retrieved 29 January 2023<br \/>\n                                                from https:\/\/phys.org\/<a href=\"https:\/\/buradabiliyorum.com\/en\/category\/news\/\" data-internallinksmanager029f6b8e52c=\"2\" title=\"News\" target=\"_blank\" rel=\"noopener\">news<\/a>\/2023-01-specks-reveal-asteroid-secrets.html<\/p>\n<p>                                             This document is subject to copyright. 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The specks are tiny. No, really tiny. Smaller than the diameter of a hair. But they hold billions of years of history that reveal some of the secrets of asteroids. The&#8230;<\/p>\n","protected":false},"author":1,"featured_media":545305,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"https:\/\/scx2.b-cdn.net\/gfx\/news\/2023\/samples-from-itokawa-a.jpg","fifu_image_alt":"","footnotes":""},"categories":[16],"tags":[],"class_list":["post-545304","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-sciencee"],"_links":{"self":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/545304","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/comments?post=545304"}],"version-history":[{"count":0,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/posts\/545304\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media\/545305"}],"wp:attachment":[{"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/media?parent=545304"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/categories?post=545304"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/buradabiliyorum.com\/en\/wp-json\/wp\/v2\/tags?post=545304"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}