- #1
SpaceBear
- 27
- 0
I would like to know the history of the value of the speed of the expansion of the universe.
If today it's 74.3 ± 2.1 kilometres per second per megaparsec then how much it was a billion years ago, 5 billion years ago, 10 billion years ago, and how much it was in the first million years after the Big Bang?
Also when the universe was approximately 379,000 years old, when the photons started to travel freely through space.
If today it's 74.3 ± 2.1 kilometres per second per megaparsec then how much it was a billion years ago, 5 billion years ago, 10 billion years ago, and how much it was in the first million years after the Big Bang?
Also when the universe was approximately 379,000 years old, when the photons started to travel freely through space.