Question

According to the big bang theory, how long ago did the universe expand explosively into existence?

A- 54.8 billion years ago
B- 27.4 billion years ago
C- 6.9 billion years ago
D- 13.7 billion years ago

Answer 1

according to the big bang theory, 13.7 billion years ago the universe expanded explosively into existence.

hope this helps, God bless!

Answer 2

D- 13.7 billion years ago

Step-by-step explanation:

According to the big bang theory, the universe started its life approximately 13.7 bilion years ago. Initially, all the matter and the energy of the universe was concentrated in a single point of infinite density, called singularity. Then, a huge and fast expansion occurs, and the universe expanded at a very fast speed: matter and energy started to separate, and they started to form the subatomic particles that we know, then atoms, molecules, and then bigger objects, such as stars and galaxies.