Questions tagged [universe]

Concerning the entire universe, the universe itself, and alternate or parallel universes.

1 question with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
53
votes
0answers
2k views

How soon can the first stars form?

Introduction In our universe, the cosmic microwave background was formed approximately 400,000 years after the Big Bang. It was hot, but within a few million years after the Big Bang, it would no ...