Big Bang
Follow velocities backward about 15 billion years
- (More recent value than 12 billion years which is stated in text)
The universe was all at the same place!
Taking into account general relativity (gravity), it implies the universe was condensed into an infinitely dense point.
That moment is called “The Big Bang”.
Since then space-time has been expanding
- Objects are NOT flying away from a ‘center”.
- Every object is an equally good center.
- There is no edge! Space-time itself is finite!