Question

question 15
about when did the first stars start to form?
none of these
billions of years after the big bang
100000 to 500000 years after the big bang

Explanation:

Current scientific understanding suggests that the first stars began to form billions of years after the Big - Bang. The time range of 100,000 - 500,000 years after the Big Bang was too early for star formation as the universe was still too hot and diffuse.

Answer:

B. billions of years after the Big Bang