The expansion or contraction of the universe depends on its content and past history. The intensity of the microwaves is the same in all directions. The expansion (or contraction) of space is a necessary consequence in a Universe that contains masses. The current rate of expansion is usually expressed as the Hubble Constant (in units of kilometers per second per Megaparsec, or just … This finding, if confirmed, would force astronomers to reassess just … With enough matter, the expansion will slow or even become a contraction.

When Hubble presented his evidence of the expansion of the universe, Einstein embraced the idea.

The accelerating expansion of the universe is the observation that the expansion of the universe is such that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.. Hubble was studying distant galaxies when he made a startling discovery: Every galaxy he … In physical cosmology, cosmic inflation, cosmological inflation, or just inflation, is a theory of exponential expansion of space in the early universe.The inflationary epoch lasted from 10 −36 seconds after the conjectured Big Bang singularity to some time between 10 −33 and 10 −32 seconds after the singularity. This expansion of the universe was first discovered by Edwin Hubble in 1931. Discuss how the background microwave radiation is linked to the big bang model of the universe. But the rate of expansion and how it behaves over time is … On the other hand, dark energy drives the universe towards increasing rates of expansion. These microwaves correspond to a temperature of 2.7 K The expansion of the universe following the big bang led to cooling and hence we observe microwaves rather than short wavelength e.m. waves / gamma waves. The expansion rate of the universe appears to vary from place to place, a new study reports. The revised expansion rate is about 10% faster than that predicted by observations of the universe's trajectory shortly after the Big Bang, according to the new research.