A video from the Chandra website regarding dark energy and dark matter. Date- 29th Feb 08. Source- http://chandra.harvard.edu/resources/podcasts/ 'When you look up at the night sky, you see a lot of things glowing like stars, planets, and galaxies. So it might sound strange to hear that most of the Universe is actually dark. The truth is the protons, neutrons and electrons that make up everything we can see, and that means everything with telescopes we've got, accounts for only about 4% of the mass and energy of the Universe. The rest is dark and mysterious. More specifically, about 70% of the Universe is what is known as dark energy; about 26% is so-called dark matter. Modern day astronomers have developed many tactics to explore the dark Universe, including using telescopes like Chandra. Blog summary of dark matter- http://blog.myspace.com/index.cfm?fuseaction=blog.view&friendID=120129993&blogID=223043141&Mytoken=882E77EF-E468-4089-BA41C0B6AB3658C580601764 Blog summary of dark energy- http://blog.myspace.com/index.cfm?fuseaction=blog.view&friendID=120129993&blogID=336082867&Mytoken=54BEB87A-B98E-47F5-8E82D96EAE9D806228957706
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