{"id":189920,"date":"2024-12-06T16:07:26","date_gmt":"2024-12-06T16:07:26","guid":{"rendered":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/12\/06\/astronomers-detect-the-first-astrosphere-around-a-sunlike-star\/"},"modified":"2024-12-06T16:07:26","modified_gmt":"2024-12-06T16:07:26","slug":"astronomers-detect-the-first-astrosphere-around-a-sunlike-star","status":"publish","type":"post","link":"https:\/\/news.talkwithrattan.com\/index.php\/2024\/12\/06\/astronomers-detect-the-first-astrosphere-around-a-sunlike-star\/","title":{"rendered":"Astronomers detect the first astrosphere around a sunlike star"},"content":{"rendered":"<div style=\"text-align:center\"><img loading=\"lazy\" decoding=\"async\" width=\"763\" height=\"456\" src=\"https:\/\/i3.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/11\/survey_cta_footprint.jpg?resize=763,456&amp;ssl=1\" class=\"attachment-post-thumbnail size-post-thumbnail wp-post-image\" alt=\"Astronomers detect the first astrosphere around a sunlike star\" title=\"Astronomers detect the first astrosphere around a sunlike star\" \/><\/div> \r\n<br><div data-component=\"video-embed\">\n\t\t\t\t\n\n\n\n\n<p><strong>BOSTON \u2014 <\/strong>For the first time, astronomers have detected an astrosphere around a star like the sun.<\/p>\n\n\n\n<p>This bubble of hot gas is blown by a star\u2019s stellar wind, a constant stream of charged particles every star emits. The sun\u2019s version of this bubble, called the heliosphere, marks <a href=\"https:\/\/www.sciencenews.org\/article\/voyager-2-spacecraft-enters-interstellar-space\">the edge of our solar system<\/a> and protects the planets from most of the <a href=\"https:\/\/www.sciencenews.org\/article\/solar-systems-edge-surprises-astronomers\">high-energy cosmic rays<\/a> that zip about the galaxy <em>(SN: 12\/10\/18, SN: 10\/15\/09)<\/em>.<\/p>\n\n\n\n<p>Astronomers have seen analogous bubbles around hot stars, dying stars and baby stars \u2014 but not sunlike stars.<\/p>\n\n\n<aside class=\"sn-conversion rich-text rich-text--with-sidebar\">\n<style><![CDATA[\n.email-conversion {\n  border: 1px solid #ffcccb;\n  color: white;\n  margin-top: 50px;\n  background-image: url(\"\/wp-content\/themes\/sciencenews\/client\/src\/images\/cta-module@2x.jpg\");\n  padding: 20px;\n  clear: both;\n}\n\n]]><\/style>\n\n\n\n<div class=\"rich-text embedded-conversion-content is-layout-flow wp-block-group-is-layout-flow\">\n<a href=\"https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSf83OekELCTbhuYw3Iu-p8OWiE9-uE56ZFNbeTapotBaa1rIg\/viewform?usp=sf_link\">\n  <\/a><\/div><a href=\"https:\/\/docs.google.com\/forms\/d\/e\/1FAIpQLSf83OekELCTbhuYw3Iu-p8OWiE9-uE56ZFNbeTapotBaa1rIg\/viewform?usp=sf_link\">\n<\/a>\n\n<style><![CDATA[\n#dynamic-conversion {\n  border: 1px solid #ffcccb;\n  max-width: 100%;\n  height: auto;\n  clear: both;\n}\n]]><\/style>\n\n\n\n\n<\/aside>\n\n\n<p>\u201cWe don\u2019t see them around \u2026 average, everyday stars that might host life,\u201d said astronomer Carey Lisse at the <a href=\"https:\/\/cxc.harvard.edu\/cdo\/symposium_2024\/\" target=\"_blank\" rel=\"noopener\">25 Years of Science with Chandra<\/a> symposium on December 3. \u201cFor 20 years, we\u2019ve been looking for this effect, and haven\u2019t seen it.\u201d<\/p>\n\n\n\n<p>Lisse and his colleagues sought a star that was blowing extra hard. The researchers aimed the orbiting Chandra X-Ray Observatory at HD 61005, nicknamed The Moth because it is surrounded by a swept-back debris disk that resembles wings. Astronomers think the strange shape is because the star is <a href=\"https:\/\/www.sciencenews.org\/article\/case-misshapen-disk\">plowing into a dense gas cloud<\/a> in space at a speed of about 10 kilometers per second <em>(SN: 1\/22\/08).<\/em><\/p>\n\n\n\n<p>The Moth is a similar size and mass as the sun, so \u201cit\u2019s a relatively good representative of us,\u201d said Lisse, of the Johns Hopkins Applied Physics Laboratory in Laurel, Md. But it\u2019s a 100-million-year-old youngster compared to the 4-billion-year-old sun. Younger stars tend to be more active and emit stronger solar winds than older ones. That extra activity, plus the star\u2019s movement through the interstellar medium, made Lisse think the Moth was a good target for detecting an astrosphere.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"640\" height=\"484\" src=\"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/12\/120524_lg_astrosphere_inline.png?fit=640%2C484&amp;ssl=1\" alt=\"Concentric rings of yellow, red and blue pixels, superimposed on an arc of white speckles on a black background\" class=\"wp-image-3147113\" srcset=\"https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/12\/120524_lg_astrosphere_inline.png?w=640&amp;ssl=1 640w, https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/12\/120524_lg_astrosphere_inline.png?resize=506%2C383&amp;ssl=1 506w, https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/12\/120524_lg_astrosphere_inline.png?resize=595%2C450&amp;ssl=1 595w, https:\/\/i0.wp.com\/www.sciencenews.org\/wp-content\/uploads\/2024\/12\/120524_lg_astrosphere_inline.png?resize=246%2C186&amp;ssl=1 246w\" sizes=\"(max-width: 640px) 100vw, 640px\"\/><figcaption class=\"wp-element-caption\"><span class=\"caption wp-caption-3147113\">The star HD 61005 (also known as the Moth) has a disk of dust that is swept into a winglike shape by its motion through space, shown in this black-and-white image from the Hubble Space Telescope. The star is surrounded by a bubble of gas that shines bright in X-rays in an image from the orbiting Chandra observatory (colored circles).<\/span><span class=\"credit wp-credit-3147113\">CXC\/NASA, C. Lisse et al 2024, STScI\/NASA, D.C. Hines et al\/The Astrophysical Journal 2007<\/span><\/figcaption><\/figure>\n\n\n\n<p>The observations showed that the Moth is surrounded by a halo of X-ray light extending 100 times as far from the star as Earth is from the sun. That light is the astrosphere, Lisse said.<\/p>\n\n\n\n<p>Surprisingly, the bubble is round rather than wing-shaped. That means the wind is so strong, it pushes outward on the dense gas cloud more than the cloud pushes back, like a thick balloon moving through thin air.<\/p>\n\n\n\n<p>Studying the astrospheres of other sunlike stars can tell us what the sun was like in its youth, Lisse says. \u201cWe were like this once,\u201d he says. \u201cThe astrosphere is telling us about the sun\u2019s history.\u201d<\/p>\n\n\n\n\t\t\t<\/div>\r\n<br>\r\n<br><a href=\"https:\/\/www.sciencenews.org\/article\/first-astrosphere-sunlike-star-moth\">Source link <\/a>","protected":false},"excerpt":{"rendered":"<p>BOSTON \u2014 For the first time, astronomers have detected an astrosphere around a star like the sun. This bubble of hot gas is blown by a star\u2019s stellar wind, a constant stream of charged particles every star emits. The sun\u2019s version of this bubble, called the heliosphere, marks the edge of our solar system and [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":189921,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"tdm_status":"","tdm_grid_status":"","fifu_image_url":"https:\/\/www.sciencenews.org\/wp-content\/uploads\/2024\/11\/survey_cta_footprint.jpg","fifu_image_alt":"","footnotes":""},"categories":[606],"tags":[7604,148673,6401,964,30324],"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/189920"}],"collection":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/comments?post=189920"}],"version-history":[{"count":1,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/189920\/revisions"}],"predecessor-version":[{"id":189922,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/posts\/189920\/revisions\/189922"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media\/189921"}],"wp:attachment":[{"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/media?parent=189920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/categories?post=189920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/news.talkwithrattan.com\/index.php\/wp-json\/wp\/v2\/tags?post=189920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}