Quote:
Originally Posted by Alphonse Alban
Because it's as much of a fact than Heliocentric theory you thought was a scientific fact no more than 5 minutes ago.
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It IS a fact. The speed of light was measured at the US Naval Academy, and astronomers have measured the distances from Earth of distant stars (not totally sure how, something to do with triangles) to be millions of light years away. So we know the universe must be at least as old as the Hubble deep field, which is a few billion years.