chapter  Chapter 19
16 Pages

Relativistic cosmology

ByJames H. Luscombe

We now turn to the largest spacetime structure—the universe. Having delved into GR and the extent to which it's been tested on the scale of the solar system, we can ask what it has to say about the universe—the view of spacetime provided by GR must be believable if we’re to have confidence in its predictions for cosmology. Over cosmological distances matter and energy are governed by the weakest force, gravity. 1