Thursday, April 4, 2013

Answer To Question 228

A228: First light is a term that refers to the earliest light emitted when the first galaxies were born. The first light occurred long after the Big Bang happened. The Big Bang occurred roughly 15 billion years ago, but the Universe was dark until the first light came millions of years after the Big Bang, after the smooth distribution of matter following the Big Bang coalesced into clumps, eventually forming galaxies.

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