The expansion rate slowed down dramatically after the big bang and then sped up again, from Wikipedia:
> Cosmic expansion subsequently decelerated to much slower rates, until at around 9.8 billion years after the Big Bang (4 billion years ago) it began to gradually expand more quickly, and is still doing so.
The expansion rate slowed down dramatically after the big bang and then sped up again, from Wikipedia:
> Cosmic expansion subsequently decelerated to much slower rates, until at around 9.8 billion years after the Big Bang (4 billion years ago) it began to gradually expand more quickly, and is still doing so.