What was the significance of the end of the era of nucleosynthesis, when the universe was about 5 minutes old?
A) The basic chemical composition of the universe had been determined.
B) The proportions of dark matter and luminous matter had been determined.
C) It marks the time at which the first stars formed.
D) It marks the time at which the expansion of the universe had settled down to its current rate.

Question

Quizplus · Accepted Answer

The end of the era of nucleosynthesis is significant because it marks the time when the basic chemical composition of the universe had been determined. During this period, lightweight elements like hydrogen and helium were synthesized, which would later form the building blocks of stars and galaxies. The relative abundances of these elements also provide evidence for the Big Bang theory.

What Was the Significance of the End of the Era