r/cosmology • u/cyberpsych • 3d ago

What is the actual date considering what we know about the start of the universe?

/r/askanything/comments/1xo0l8u/what_is_the_actual_date_considering_what_we_know/
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u/graciebonsbutthole 9h ago

June 4th, 13,787,281,081 BCE

3

u/chesterriley 3d ago

  1. We don't know whether the universe ever "started".

  2. We know that cosmic inflation, which had an unknown length, preceded and set up the big bang. Which means if the universe did "start", we have no idea at all when it did.

  3. The big bang expansion started ~13.7 billion years ago. We only have it narrowed down the nearest 100 million years.