{"id":15369,"date":"2017-12-20T13:00:03","date_gmt":"2017-12-20T18:00:03","guid":{"rendered":"http:\/\/hobbyspace.com\/Blog\/?p=15369"},"modified":"2017-12-20T11:20:20","modified_gmt":"2017-12-20T16:20:20","slug":"eso-vlt-observes-huge-bubble-patterns-on-surface-of-red-giant-star","status":"publish","type":"post","link":"https:\/\/hobbyspace.com\/Blog\/?p=15369","title":{"rendered":"ESO: VLT observes huge bubble patterns on surface of red giant star"},"content":{"rendered":"<p>The latest report from <a href=\"https:\/\/www.eso.org\/public\/news\/eso1741\/?lang\" target=\"_d\">ESO<\/a> (European Southern Observatory):<\/p>\n<p style=\"text-align: center;\"><strong><a href=\"https:\/\/www.eso.org\/public\/news\/eso1741\/?lang\" target=\"_blank\" rel=\"noopener\">Giant Bubbles on Red Giant Star\u2019s Surface<\/a>\u00a0<\/strong><\/p>\n<p><figure id=\"attachment_15370\" aria-describedby=\"caption-attachment-15370\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.eso.org\/public\/images\/eso1741a\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"15370\" data-permalink=\"https:\/\/hobbyspace.com\/Blog\/?attachment_id=15370\" data-orig-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1.jpg\" data-orig-size=\"700,700\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;ESO&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;Astronomers using ESO\\u2019s Very Large Telescope have directly observed granulation patterns on the surface of a star outside the Solar System \\u2014 the ageing red giant \\u03c01 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star. Each cell covers more than a quarter of the star\\u2019s diameter and measures about 120 million kilometres across.&quot;,&quot;created_timestamp&quot;:&quot;1513796400&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;The surface of the red giant star \\u03c01 Gruis from PIONIER on the&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"The surface of the red giant star \u03c01 Gruis from PIONIER on the\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;Astronomers using ESO\u2019s Very Large Telescope have directly observed granulation patterns on the surface of a star outside the Solar System \u2014 the ageing red giant \u03c01 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star. Each cell covers more than a quarter of the star\u2019s diameter and measures about 120 million kilometres across.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1.jpg\" class=\"wp-image-15370\" src=\"http:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1.jpg\" alt=\"\" width=\"500\" height=\"500\" srcset=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1.jpg 700w, https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1-150x150.jpg 150w, https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741a1-300x300.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><figcaption id=\"caption-attachment-15370\" class=\"wp-caption-text\"><em>Astronomers using ESO\u2019s Very Large Telescope have directly observed granulation patterns on the surface of a star outside the Solar System \u2014 the ageing red giant \u03c01 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star. Each cell covers more than a quarter of the star\u2019s diameter and measures about 120 million kilometres across. [<a href=\"https:\/\/www.eso.org\/public\/images\/eso1741a\/\" target=\"_blank\" rel=\"noopener\">Larger image<\/a>.]<\/em><\/figcaption><\/figure>Astronomers using ESO\u2019s Very Large Telescope have for the first time directly observed granulation patterns on the surface of a star outside the Solar System \u2014 the ageing red giant \u03c01 Gruis. This remarkable new image from the PIONIER instrument reveals the convective cells that make up the surface of this huge star, which has 350 times the diameter of the Sun. Each cell covers more than a quarter of the star\u2019s diameter and measures about 120 million kilometres across. These new results are being published this week in the journal Nature.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/L0E8moAlEDk?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>Located 530 light-years from Earth in the constellation of\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Grus_(constellation)\" target=\"_blank\" rel=\"noopener\">Grus<\/a>\u00a0(The Crane),\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Pi1_Gruis\" target=\"_blank\" rel=\"noopener\">\u03c01\u00a0Gruis<\/a>\u00a0is a cool\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Red_giant\" target=\"_blank\" rel=\"noopener\">red giant<\/a>. It has about the same mass as our Sun, but is 350 times larger and several thousand times as bright\u00a0<a href=\"#1\">[1]<\/a>. Our Sun will swell to become a similar red giant star in about five billion years.<\/p>\n<p>An international team of astronomers led by Claudia Paladini (ESO) used the\u00a0<a href=\"https:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/vlt\/vlt-instr\/pionier\/\" target=\"_blank\" rel=\"noopener\">PIONIER<\/a>\u00a0instrument on ESO\u2019s\u00a0<a href=\"http:\/\/www.eso.org\/public\/teles-instr\/paranal-observatory\/vlt\/\" target=\"_blank\" rel=\"noopener\">Very Large Telescope<\/a>\u00a0to observe \u03c01\u00a0Gruis in greater detail than ever before. They found that the surface of this red giant has just a few convective cells, or granules, that are each about 120 million kilometres across \u2014 about a quarter of the star\u2019s diameter\u00a0<a href=\"#2\">[2]<\/a>. Just one of these granules would extend from the Sun to beyond Venus. The surfaces \u00a0\u2014 known as\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Photosphere\" target=\"_blank\" rel=\"noopener\">photospheres<\/a>\u00a0\u2014 \u00a0of many giant stars are obscured by dust, which hinders observations. However, in the case of \u03c01\u00a0Gruis, although dust is present far from the star, it does not have a significant effect on the new infrared observations\u00a0<a href=\"#3\">[3]<\/a>.<\/p>\n<p><figure id=\"attachment_15371\" aria-describedby=\"caption-attachment-15371\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.eso.org\/public\/images\/eso1741b\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"15371\" data-permalink=\"https:\/\/hobbyspace.com\/Blog\/?attachment_id=15371\" data-orig-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741b1.jpg\" data-orig-size=\"700,595\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;ESO\/Digitized Sky Survey 2. Ackn&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;This colourful image shows the sky around the bright pair of stars \\u03c01 Gruis (centre-right, very red) and \\u03c02 Gruis (centre-left, bluish-white). Just right of centre the bright spiral galaxy IC 5201 is also visible and many other fainter galaxies are scattered across this wide-field image from the Digitized Sky Survey 2.&quot;,&quot;created_timestamp&quot;:&quot;1513796400&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;Widefield image of the sky around \\u03c01 Gruis&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"Widefield image of the sky around \u03c01 Gruis\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;This colourful image shows the sky around the bright pair of stars \u03c01 Gruis (centre-right, very red) and \u03c02 Gruis (centre-left, bluish-white). Just right of centre the bright spiral galaxy IC 5201 is also visible and many other fainter galaxies are scattered across this wide-field image from the Digitized Sky Survey 2.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741b1.jpg\" class=\"wp-image-15371\" src=\"http:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741b1.jpg\" alt=\"\" width=\"500\" height=\"425\" srcset=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741b1.jpg 700w, https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741b1-300x255.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><figcaption id=\"caption-attachment-15371\" class=\"wp-caption-text\"><em>This colourful image shows the sky around the bright pair of stars \u03c01 Gruis (centre-right, very red) and \u03c02 Gruis (centre-left, bluish-white). Just right of centre the bright spiral galaxy IC 5201 is also visible and many other fainter galaxies are scattered across this wide-field image from the Digitized Sky Survey 2. [<a href=\"https:\/\/www.eso.org\/public\/images\/eso1741b\/\" target=\"_blank\" rel=\"noopener\">Larger images<\/a>]<\/em><\/figcaption><\/figure>When \u03c01\u00a0Gruis ran out of hydrogen to burn long ago, this ancient star ceased the first stage of its nuclear fusion programme. It shrank as it ran out of energy, causing it to heat up to over 100 million degrees. These extreme temperatures fueled the star\u2019s next phase as it began to fuse helium into heavier atoms such as carbon and oxygen. This intensely hot core then expelled the star\u2019s outer layers, causing it to balloon to hundreds of times larger than its original size. The star we see today is a\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Variable_star\" target=\"_blank\" rel=\"noopener\">variable<\/a>\u00a0red giant. Until now, the surface of one of these stars has never before been imaged in detail.<\/p>\n<p><span class=\"embed-youtube\" style=\"text-align:center; display: block;\"><iframe loading=\"lazy\" class=\"youtube-player\" width=\"1600\" height=\"900\" src=\"https:\/\/www.youtube.com\/embed\/TcjXYUzO-gc?version=3&#038;rel=1&#038;showsearch=0&#038;showinfo=1&#038;iv_load_policy=1&#038;fs=1&#038;hl=en&#038;autohide=2&#038;wmode=transparent\" allowfullscreen=\"true\" style=\"border:0;\" sandbox=\"allow-scripts allow-same-origin allow-popups allow-presentation allow-popups-to-escape-sandbox\"><\/iframe><\/span><\/p>\n<p>By comparison, the Sun\u2019s photosphere contains about two million convective cells, with typical diameters of just 1500 kilometres. The vast size differences in the convective cells of these two stars can be explained in part by their varying\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Surface_gravity\" target=\"_blank\" rel=\"noopener\">surface gravities<\/a>. \u03c01\u00a0Gruis is just 1.5 times the mass of the Sun but much larger, resulting in a much lower surface gravity and just a few, extremely large, granules.<\/p>\n<p>While stars more massive than eight solar masses end their lives in dramatic\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Supernova\" target=\"_blank\" rel=\"noopener\">supernovae<\/a>\u00a0explosions, less massive stars like this one gradually expel their outer layers, resulting in beautiful\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Planetary_nebula\" target=\"_blank\" rel=\"noopener\">planetary nebulae<\/a>. Previous studies of \u03c01\u00a0Gruis found a shell of material 0.9 light-years away from the central star, thought to have been ejected around 20 000 years ago. This relatively short period in a star&#8217;s life lasts just a few tens of thousands of years \u2013 compared to the overall lifetime of several billion \u2013 and these observations reveal a new method for probing this fleeting red giant phase.<\/p>\n<figure id=\"attachment_15372\" aria-describedby=\"caption-attachment-15372\" style=\"width: 500px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/www.eso.org\/public\/images\/eso1741c\/\" target=\"_blank\" rel=\"noopener\"><img loading=\"lazy\" decoding=\"async\" data-attachment-id=\"15372\" data-permalink=\"https:\/\/hobbyspace.com\/Blog\/?attachment_id=15372\" data-orig-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741c1.jpg\" data-orig-size=\"700,730\" data-comments-opened=\"0\" data-image-meta=\"{&quot;aperture&quot;:&quot;0&quot;,&quot;credit&quot;:&quot;ESO, IAU and Sky \\u0026amp; Telescope&quot;,&quot;camera&quot;:&quot;&quot;,&quot;caption&quot;:&quot;This chart shows the southern constellation of Grus (The Crane) and marks most stars that can be seen with the unaided eye on a clear dark night. The red circle indicates the location of the red giant star \\u03c01 Gruis, which forms a colourful pairing with \\u03c02 Gruis, visible with a small telescope or binoculars.&quot;,&quot;created_timestamp&quot;:&quot;1513796400&quot;,&quot;copyright&quot;:&quot;&quot;,&quot;focal_length&quot;:&quot;0&quot;,&quot;iso&quot;:&quot;0&quot;,&quot;shutter_speed&quot;:&quot;0&quot;,&quot;title&quot;:&quot;The red giant star \\u03c01 Gruis in the constellation of Grus&quot;,&quot;orientation&quot;:&quot;0&quot;}\" data-image-title=\"The red giant star \u03c01 Gruis in the constellation of Grus\" data-image-description=\"\" data-image-caption=\"&lt;p&gt;This chart shows the southern constellation of Grus (The Crane) and marks most stars that can be seen with the unaided eye on a clear dark night. The red circle indicates the location of the red giant star \u03c01 Gruis, which forms a colourful pairing with \u03c02 Gruis, visible with a small telescope or binoculars.&lt;\/p&gt;\n\" data-large-file=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741c1.jpg\" class=\"wp-image-15372\" src=\"http:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741c1.jpg\" alt=\"\" width=\"500\" height=\"521\" srcset=\"https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741c1.jpg 700w, https:\/\/hobbyspace.com\/Blog\/wp-content\/uploads\/2017\/12\/eso1741c1-288x300.jpg 288w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/a><figcaption id=\"caption-attachment-15372\" class=\"wp-caption-text\"><em>This chart shows the southern constellation of Grus (The Crane) and marks most stars that can be seen with the unaided eye on a clear dark night. The red circle indicates the location of the red giant star \u03c01 Gruis, which forms a colourful pairing with \u03c02 Gruis, visible with a small telescope or binoculars.<\/em><\/figcaption><\/figure>\n<p><strong>Notes<\/strong><br \/>\n<a name=\"1\"><\/a>[1] \u03c01\u00a0Gruis is named following the\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Bayer_designation\" target=\"_blank\" rel=\"noopener\">Bayer designation<\/a>\u00a0system. In 1603 the German astronomer Johann Bayer classified 1564 stars, naming them by a Greek letter followed by the name of their parent constellation. Generally, stars were assigned Greek letters in rough order of how bright they appeared from Earth, with the brightest designated Alpha (\u03b1). The brightest star of the Grus constellation is therefore\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Alpha_Gruis\" target=\"_blank\" rel=\"noopener\">Alpha Gruis<\/a>.<\/p>\n<p>\u03c01\u00a0Gruis is one of an attractive pair of stars of contrasting colours that appear close together in the sky, the other one naturally being named \u03c02\u00a0Gruis. They are bright enough to be well seen in a pair of binoculars.\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Thomas_Brisbane\" target=\"_blank\" rel=\"noopener\">Thomas Brisbane<\/a>\u00a0realised in the 1830s that \u03c01\u00a0Gruis was itself also a much closer binary star system.\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Annie_Jump_Cannon\" target=\"_blank\" rel=\"noopener\">Annie Jump Cannon<\/a>, credited with the creation of the\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Stellar_classification#Harvard_spectral_classification\" target=\"_blank\" rel=\"noopener\">Harvard Classification Scheme<\/a>, was the first to report the unusual spectrum of \u03c01\u00a0Gruis in 1895.<\/p>\n<p><a name=\"2\"><\/a>[2] Granules are patterns of\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Convection\" target=\"_blank\" rel=\"noopener\">convection<\/a>\u00a0currents in the plasma of a star. As plasma heats up at the centre of the star it expands and rises to the surface, then cools at the outer edges, becoming darker and more dense, and descends back to the centre. This process continues for billions of years and plays a major role in many astrophysical processes including energy transport, pulsation, stellar wind and dust clouds on brown dwarfs.<\/p>\n<p><a name=\"3\"><\/a>[3] \u03c01\u00a0Gruis is one of the brightest members of the rare\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/S-type_star\" target=\"_blank\" rel=\"noopener\">S class<\/a>\u00a0of stars that was first defined by the American astronomer Paul W. Merrill to group together stars with similarly unusual spectra. \u03c01\u00a0Gruis,\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/R_Andromedae\" target=\"_blank\" rel=\"noopener\">R Andromedae<\/a>\u00a0and\u00a0<a href=\"https:\/\/www.aavso.org\/vsots_rcyg\" target=\"_blank\" rel=\"noopener\">R Cygni<\/a>\u00a0became prototypes of this type. Their unusual spectra is now known to be the result of the \u201c<a href=\"https:\/\/en.wikipedia.org\/wiki\/S-process\" target=\"_blank\" rel=\"noopener\">s-process<\/a>\u201d or \u201cslow neutron capture process\u201d \u2014 responsible for the creation of half the\u00a0<a href=\"https:\/\/en.wikipedia.org\/wiki\/Heavy_metals\" target=\"_blank\" rel=\"noopener\">elements heavier than iron<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>The latest report from ESO (European Southern Observatory): Giant Bubbles on Red Giant Star\u2019s Surface\u00a0 Astronomers using ESO\u2019s Very Large Telescope have for the first time directly observed granulation patterns on the surface of a star outside the Solar System \u2014 the ageing red giant \u03c01 Gruis. This remarkable new image from the PIONIER instrument &hellip; <a href=\"https:\/\/hobbyspace.com\/Blog\/?p=15369\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">ESO: VLT observes huge bubble patterns on surface of red giant star<\/span> <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"jetpack_post_was_ever_published":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[12],"tags":[],"class_list":["post-15369","post","type-post","status-publish","format-standard","hentry","category-astronomy"],"jetpack_featured_media_url":"","jetpack_sharing_enabled":true,"jetpack_shortlink":"https:\/\/wp.me\/p34aWK-3ZT","jetpack-related-posts":[{"id":26972,"url":"https:\/\/hobbyspace.com\/Blog\/?p=26972","url_meta":{"origin":15369,"position":0},"title":"ESO: Surface bubbles of another star tracked in highest detail ever","author":"TopSpacer","date":"September 11, 2024","format":false,"excerpt":"A new report from the European Southern Observatory (ESO): Astronomers track bubbles on star\u2019s surface in most detailed video yet For the first time, astronomers have captured images of a star other than the Sun in enough detail to track the motion of bubbling gas on its surface. The images\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2024\/09\/eso2412a1-500x201.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":21935,"url":"https:\/\/hobbyspace.com\/Blog\/?p=21935","url_meta":{"origin":15369,"position":1},"title":"ESO: Small hot stars display giant magnetic spots and super-flares","author":"TopSpacer","date":"June 1, 2020","format":false,"excerpt":"The latest report from ESO (European Southern Observatory): Hot stars are plagued by giant magnetic spots, ESO data shows Astronomers using European Southern Observatory (ESO) telescopes have discovered giant spots on the surface of extremely hot stars hidden in stellar clusters. Not only are these stars plagued by magnetic spots,\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/05\/eso2009a1-500x300.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]},{"id":10731,"url":"https:\/\/hobbyspace.com\/Blog\/?p=10731","url_meta":{"origin":15369,"position":2},"title":"ESO: Red Giant L2 Puppis and companion star creating butterfly planetary nebula","author":"TopSpacer","date":"June 10, 2015","format":false,"excerpt":"A new report from\u00a0ESO\u00a0(European Southern Observatory): A Celestial Butterfly Emerges from its Dusty Cocoon Some of the sharpest images ever made with ESO\u2019s Very Large Telescope have, for the first time, revealed what appears to be an ageing star giving birth to a butterfly-like planetary nebula. These observations of the\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"eso1523a[1]","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2015\/06\/eso1523a1-1024x1024.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":11801,"url":"https:\/\/hobbyspace.com\/Blog\/?p=11801","url_meta":{"origin":15369,"position":3},"title":"ESO: Giant star reveals how it loses mass","author":"TopSpacer","date":"November 25, 2015","format":false,"excerpt":"The latest report from the\u00a0ESO\u00a0(European Southern Observatory): Aging Star\u2019s Weight Loss Secret Revealed Giant star caught in the act of slimming down A team of astronomers using ESO\u2019s Very Large Telescope (VLT) has captured the most detailed images ever of the hypergiant star VY Canis Majoris. These observations show how\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"The star VY Canis Majoris is a red hypergiant, one of the largest known stars in the Milky Way. It is 30\u201340 times the mass of the Sun and 300 000 times more luminous. In its current state, the star would encompass the orbit of Jupiter, having expanded tremendously as it enters the final stages of its life. New observations of the star using the SPHERE instrument on the VLT have clearly revealed how the brilliant light of VY Canis Majoris lights up the clouds of material surrounding it and have allowed the properties of the component dust grains to be determined better than ever before. In this very close-up view from SPHERE the star itself is hidden behind an obscuring disc. The crosses are artefacts due to features in the instrument.","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2015\/11\/eso1546a1-1024x951.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":17601,"url":"https:\/\/hobbyspace.com\/Blog\/?p=17601","url_meta":{"origin":15369,"position":4},"title":"ESO: Fleeting glow of an old star&#8217;s last great blast","author":"TopSpacer","date":"January 22, 2019","format":false,"excerpt":"The latest report from the European Southern Observatory (ESO): A Fleeting Moment in Time European Southern Observatory\u2019s Cosmic Gems Programme captures last breath of a dying star The faint, ephemeral glow emanating from the planetary nebula ESO 577-24 persists for only a short time \u2014 around 10,000 years, a blink\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2019\/01\/eso1902a1.jpg?resize=350%2C200","width":350,"height":200},"classes":[]},{"id":21067,"url":"https:\/\/hobbyspace.com\/Blog\/?p=21067","url_meta":{"origin":15369,"position":5},"title":"ESO: ALMA spots red giant engulfing companion star","author":"TopSpacer","date":"February 5, 2020","format":false,"excerpt":"The latest report from the European Southern Observatory (ESO): ALMA catches beautiful outcome of stellar fight Astronomers using the Atacama Large Millimeter\/submillimeter Array (ALMA), in which ESO is a partner, have spotted a peculiar gas cloud that resulted from a confrontation between two stars. One star grew so large it\u2026","rel":"","context":"In &quot;Astronomy&quot;","block_context":{"text":"Astronomy","link":"https:\/\/hobbyspace.com\/Blog\/?cat=12"},"img":{"alt_text":"","src":"https:\/\/i0.wp.com\/hobbyspace.com\/Blog\/wp-content\/uploads\/2020\/02\/eso2002a1-500x360.jpg?resize=350%2C200&ssl=1","width":350,"height":200},"classes":[]}],"_links":{"self":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/15369","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=15369"}],"version-history":[{"count":1,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/15369\/revisions"}],"predecessor-version":[{"id":15373,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=\/wp\/v2\/posts\/15369\/revisions\/15373"}],"wp:attachment":[{"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=15369"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=15369"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hobbyspace.com\/Blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=15369"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}