{"id":404656,"date":"2010-03-08T09:00:27","date_gmt":"2010-03-08T14:00:27","guid":{"rendered":"http:\/\/blogs.discovermagazine.com\/badastronomy\/?p=12686"},"modified":"2010-03-08T09:00:27","modified_gmt":"2010-03-08T14:00:27","slug":"lonely-galaxy-is-lonely-but-it-ate-its-friends-bad-astronomy","status":"publish","type":"post","link":"https:\/\/mereja.media\/index\/404656","title":{"rendered":"Lonely galaxy is lonely. But it ate its friends. | Bad Astronomy"},"content":{"rendered":"<p>Do cannibals have friends? I imagine some must&#8230; unless they have them over for dinner. <\/p>\n<p>Just like the giant elliptical galaxy ESO 306-17, which you can see <a rel=\"nofollow\"  href=\"http:\/\/www.spacetelescope.org\/news\/html\/heic1004.html\">in this gorgeous Hubble picture<\/a>:<\/p>\n<p><a rel=\"nofollow\"  href=\"http:\/\/www.spacetelescope.org\/images\/screen\/heic1004a.jpg\"><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blogs.discovermagazine.com\/badastronomy\/files\/2010\/03\/ESO-306-17.jpg\" alt=\"ESO-306-17\" title=\"ESO-306-17\" width=\"610\" height=\"606\" class=\"aligncenter size-full wp-image-12696\"\/><\/a><br clear=\"all\"><\/p>\n<p>[Click to embiggen, or grab <a rel=\"nofollow\"  href=\"http:\/\/www.spacetelescope.org\/images\/large\/heic1004a.jpg\">the monster 3800 x 3800 pixel version<\/a>. They have <a rel=\"nofollow\"  href=\"http:\/\/www.spacetelescope.org\/images\/html\/heic1004a.html\">wallpapers<\/a>, too.] <\/p>\n<p>ESO 306-17 sits about a billion light years from Earth. In this picture it looks like it&#8217;s surrounded by other galaxies, but that&#8217;s an illusion: all the other galaxies you see here are either much closer to us or much farther away. ESO 306-17 is actually a loner, sitting all by itself in space.<em>[Update: Or almost all alone; Michael West, who led the team that took these images, tells me the little elliptical at the bottom left of ESO 306-17 may be interacting with it. It&#8217;s difficult to tell; but what is certain is that there are very few galaxies near the big one, far fewer than you&#8217;d expect.]<\/em><\/p>\n<p>How can a galaxy get this big and yet be sitting in a giant void? Easy. It ate all the neighbors. We know this is how galaxies grow in size, and is even why <a rel=\"nofollow\"  href=\"http:\/\/blogs.discovermagazine.com\/badastronomy\/2010\/02\/24\/alien-clusters-invade-our-galaxy\/\">the Milky Way is a giant among galaxies<\/a>. Like our galaxy, ESO 306-17 has a lot of globular clusters around it, just as you&#8217;d expect if it ate a bunch of other galaxies.<\/p>\n<p>When I downloaded the bigger image, I noticed this weird galaxy on the left:<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/blogs.discovermagazine.com\/badastronomy\/files\/2010\/03\/ESO-306-17_detail.jpg\" alt=\"ESO-306-17_detail\" title=\"ESO-306-17_detail\" width=\"610\" height=\"534\" class=\"aligncenter size-full wp-image-12697\"\/><\/p>\n<p>Wow. I&#8217;m guessing that long stretched-out junk is a small galaxy that got shredded, maybe after a close pass to that spiral. I thought for a moment the spiral might be active &#8212; that is, the black hole in its core was actively eating matter and ejecting long jets of gas and light &#8212; but the core itself is not bright, as you&#8217;d expect. Plus, the material is lumpy and irregular, more indicative of a cosmic collision in progress. It&#8217;s unrelated to the elliptical, but still very cool.<\/p>\n<p>I really urge you to download the big image and take a nice, long look at it. There&#8217;s a lot to see, and it&#8217;s all really beautiful.<\/p>\n<p><font size=\"-2\"><em>Image credit: NASA, ESA and Michael West (ESO)<\/em><\/font><\/p>\n<p><a rel=\"nofollow\"  href=\"http:\/\/feedads.g.doubleclick.net\/~a\/UD3MeyWDrm6LdFlP8xmwfgTE9w8\/0\/da\"><img decoding=\"async\" src=\"http:\/\/feedads.g.doubleclick.net\/~a\/UD3MeyWDrm6LdFlP8xmwfgTE9w8\/0\/di\" border=\"0\" ismap><\/a><br \/>\n<a rel=\"nofollow\"  href=\"http:\/\/feedads.g.doubleclick.net\/~a\/UD3MeyWDrm6LdFlP8xmwfgTE9w8\/1\/da\"><img decoding=\"async\" src=\"http:\/\/feedads.g.doubleclick.net\/~a\/UD3MeyWDrm6LdFlP8xmwfgTE9w8\/1\/di\" border=\"0\" ismap><\/a><\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~r\/BadAstronomyBlog\/~4\/GL0AenypvN4\" height=\"1\" width=\"1\"\/><img loading=\"lazy\" decoding=\"async\" src=\"http:\/\/feeds.feedburner.com\/~r\/DiscoverMag\/~4\/b9QEMMWrAOk\" height=\"1\" width=\"1\"\/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Do cannibals have friends? I imagine some must&#8230; unless they have them over for dinner. Just like the giant elliptical galaxy ESO 306-17, which you can see in this gorgeous Hubble picture: [Click to embiggen, or grab the monster 3800 x 3800 pixel version. They have wallpapers, too.] ESO 306-17 sits about a billion light [&hellip;]<\/p>\n","protected":false},"author":641,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-404656","post","type-post","status-publish","format-standard","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/404656","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/users\/641"}],"replies":[{"embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/comments?post=404656"}],"version-history":[{"count":0,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/posts\/404656\/revisions"}],"wp:attachment":[{"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/media?parent=404656"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/categories?post=404656"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mereja.media\/index\/wp-json\/wp\/v2\/tags?post=404656"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}