Physics Stack Exchange is a question and answer site for active researchers, academics and students of physics. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

What is the total momentum of the whole Universe in reference to the point in space where the Big Bang took place?

According to my reasoning (and a bit elementary knowledge) it should be exactly equal to 0 since the 'explosion' and scattering of the matter throught the space would not change the total momentum in any way.

share|cite|improve this question
up vote 6 down vote accepted

There is no point in space where the big bang took place. It happened everywhere, simultaneously. Centered on Earth, since everything is moving away from us with a uniform velocity (or is stationary with respect to the CMB, if you prefer), the net momentum of the universe is approximately zero.

share|cite|improve this answer
But you should be cautious about thinking of the big bang as an 'explosion' – Jerry Schirmer Sep 21 '12 at 18:14

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.