the ‘big bang

the ‘big bang’

The Big Bang theory proposes that approximately

13.7 billion years ago the Universe began with a

primordial explosion. A vast cloud resulted. From

that raw material, galaxies, stars, planets, and all

other celestial bodies eventually formed—all through

processes dominated by gravity.

The belief in an “expanding universe” (and by

theoretical implication, the primordial Big

Bang) arose primarily from an interpretation of

changes in the light coming from distant

objects in space.