geekosaur: orange tabby with head canted 90 degrees, giving impression of "maybe it'll make more sense if I look at it this way?" (Default)
changing ([personal profile] geekosaur) wrote in [personal profile] xiphias 2008-11-03 04:56 am (UTC)

One of the big open questions is whether there is enough mass in the universe to make a cosmic black hole &mdash this is why astronomers are searching for "dark matter" and "dark energy"; many things become simpler if the universe is closed.
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