The correct response is:
13.8 billion years ago, right after the universe first formed.
Galaxies began to form after the Big Bang, which is estimated to have occurred around 13.8 billion years ago.
Responses
approximately 50 million years ago, after initial clumps of material were formed
approximately 50 million years ago, after initial clumps of material were formed
13.8 billion years ago, right after the universe first formed
13.8 billion years ago, right after the universe first formed
800 million years ago, when gas concentrations were optimal for galaxy formation
800 million years ago, when gas concentrations were optimal for galaxy formation
23.4 billion years ago, when the universe first formed
1 answer
The correct response is:
13.8 billion years ago, right after the universe first formed.
Galaxies began to form after the Big Bang, which is estimated to have occurred around 13.8 billion years ago.