What do astronomers mean by the Big Bang?
A) The event that marked the beginning of the expansion of the universe
B) A gigantic explosion that blew all the galaxies in the universe to smithereens
C) The explosion of a massive star at the end of its life
D) The event that marked the birth of our solar system

Question

Quizplus · Accepted Answer

The Big Bang refers to the event that marked the beginning of the expansion of the universe, approximately 13.8 billion years ago. It was not an explosion of matter, but rather a rapid expansion of space itself.

What Do Astronomers Mean by the Big Bang