Has the Missing 80% of the Universe’s Mass Been Found?
The universe has never made things easy: every time you look away, it becomes bigger, stranger, curiouser. And that’s only the part we can see. As you might have heard if you pay attention to these things (and will be distressed to learn if you don’t) up to 80% of the matter in the universe is simply missing. The Milky Way spins so fast it would fly apart if the gravity of some invisible matter weren’t holding it together. Clusters of galaxies, buzzing around one another like angry bees, would similarly fragment and disperse. And when you run the gravitational numbers, the mysterious matter that keeps all that cosmic disintegration from happening should outweigh the familiar stuff by about four-to-one/.../
Read more: http://science.time.com/2013/04/05/has-the-missing-80-of-the-universes-mass-been-found/#ixzz2Ph6ghANz
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