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1 The Universe is 13.82 billion years old. 2  The Universe is expanding a bit slower than we expected. 3  The Universe is 4.9 percent normal matter, 26.8 percent dark matter, and 68.3 percent dark energy.  The Universe is lopsided. Just a bit, just a hint, but that has profound implications.
Assuming a Hubble time of 13.6 billion years and a constant rate of expansion, what was the scale factor (Râ) of the universe 10.2 billion years ago (compared to today)? 0.25 At a redshift of z = 1,000, the universe was