http://clipmarks.com/tags/unobservable/http://rss.clipmarks.com/tags/unobservable/15Clip, tag and save information that's important to you. Bookmarks save entire pages...Clipmarks save the specific content that matters to you!en-ushttp://clipmarks.com/clipmark/B6941E24-255B-4467-9C3F-03A0CAD2EF97/<b>clipped by:</b> <a href="http://clipmarks.com/clipper/tabsey/">tabsey</a><br><div border="2" style="margin-top: 10px; border:#000000 1px solid;" width="90%"><div style="background-color:"><div align="center" width="100%" style="padding:4px;margin-bottom:4px;background-color:#666666;overflow:hidden;"><span style="color:#FFFFFF;font-weight:bold;">Clip Source: <a style="color:#FFFFFF;" href="http://www.dailygalaxy.com/my_weblog/2008/09/is-a-dark-matte.html" title="http://www.dailygalaxy.com/my_weblog/2008/09/is-a-dark-matte.html">www.dailygalaxy.com</a></span></div><div style="padding: 10px;"><img src="http://clipmarks.com/image_cache/tabsey/512/188ECD54-83A6-443F-8D39-31A1BB853C2C.gif" alt="M104" /><br /></div><hr size="2" color="#666666" /><div style="padding: 10px;"><div style="text-align:left;"><P>We now know about two dozen of these satellite galaxies.  One of the most recent is "Segue 1", uncovered by the Sloan Digital Sky Survey (SDSS), whose extremely low light-to-mass ratio makes it a particularly significant cosmic find.  Despite having a mass of a million suns it is nowhere near as luminous as astronomers would expect, with only a couple of hundred stars visible.  They think "How can so much matter be so dark?", then they go "Dark matter!" and at this point we like to believe their monocle flies out and they dash down the street shouting Eureka.</P></div></div><hr size="2" color="#666666" /><div style="padding: 10px;"><div style="text-align:left;"><P> Of course, the actual physics of arriving at this conclusion is a tiny bit more complicated, but the result is the same: Marla Geha (Yale professor of astronomy) and colleagues believe that it's a galaxy composed mainly of dark matter.  A handy thing to have around when you're trying to study the stuff or even prove that it exists. </P></div></div><hr size="2" color="#666666" /><div style="padding: 10px;"><div style="text-align:left;">These mini-galaxies and other previously unobservable objects offer a wealth of data on galaxy formation</div></div></div></div><br><div style="margin-bottom: 40px;">Tags: <a href="http://clipmarks.com/tags/astronomy/" rel="tag">astronomy</a></div>http://www.dailygalaxy.com/my_weblog/2008/09/is-a-dark-matte.htmlThu, 25 Sep 2008 12:33:01 GMThttp://clipmarks.com/clipmark/F22B6833-8443-4F97-ABF1-9BF338658926/<b>clipped by:</b> <a href="http://clipmarks.com/clipper/invictus/">invictus</a><br><b>clipper's remarks:</b> Quite interesting article. <br><div border="2" style="margin-top: 10px; border:#000000 1px solid;" width="90%"><div style="background-color:"><div align="center" width="100%" style="padding:4px;margin-bottom:4px;background-color:#666666;overflow:hidden;"><span style="color:#FFFFFF;font-weight:bold;">Clip Source: <a style="color:#FFFFFF;" href="http://cosmicvariance.com/2008/03/15/science-and-unobservable-things/" title="http://cosmicvariance.com/2008/03/15/science-and-unobservable-things/">cosmicvariance.com</a></span></div><div style="padding: 10px;"><div style="text-align:left;"><P>If you are firmly convinced that talking about the multiverse and other unobservable things is deeply unscientific and a leading indicator of the Decline of the West, nothing I say will change your mind. In particular, you may judge that the question which inflation tries to answer — “Why was the early universe like that?” — is <EM>a priori</EM> unscientific, and we should just accept the universe as it is. That’s an intellectually consistent position that you are welcome to take. The good news is that the overwhelming majority of interesting science being done today remains closely connected to tangible phenomena just as it (usually!) has been through the history of modern science. But if you instead ask in good faith why sensible people would be led to hypothesize all of this unobservable superstructure, there are perfectly good answers to be had.</P></div></div></div></div><br><div style="margin-bottom: 40px;">Tags: <a href="http://clipmarks.com/tags/universe/" rel="tag">universe</a>, <a href="http://clipmarks.com/tags/scientific+approach/" rel="tag">scientific approach</a>, <a href="http://clipmarks.com/tags/speculation/" rel="tag">speculation</a>, <a href="http://clipmarks.com/tags/multiverse/" rel="tag">multiverse</a>, <a href="http://clipmarks.com/tags/unobservable/" rel="tag">unobservable</a>, <a href="http://clipmarks.com/tags/science/" rel="tag">science</a></div>http://cosmicvariance.com/2008/03/15/science-and-unobservable-things/Tue, 18 Mar 2008 16:42:52 GMT