The dense, hot point exploded, flinging matter everywhere, as matter expanded from the point, it cooled, around—.
- 300 million years after Big Bang,🪐began forming-has been evolving since.
- 400 million years after Big Bang, ⭐️ began forming-have been evolving since.
- 200 million years after Big Bang,🌎began forming-has been evolving since.