Space is not a boring static stage on which events unfold over time, but a dynamic entity with curvature, fluctuations and a rich life of its own which is a booming area of study. Spectacular new measurements of the cosmic microwave background, gravitational lensing, type Ia supernovae, large-scale structure, spectra of the Lyman forest, stellar dynamics and x-ray binaries are probing the properties of spacetime over 22 orders of magnitude in scale. Current measurements are consistent with an infinite flat everlasting universe containing about 30% cold dark matter, 65% dark energy and at least two distinct populations of black holes.
The Early Universe and Observational Cosmology
- Pub Date:
- General Relativity and Quantum Cosmology;
- High Energy Physics - Theory
- Invited review for Science, 4 figs. Slightly abbreviated published version available at http://www.hep.upenn.edu/~max/spacetime.html