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Chris_Gottschal
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How fast is the universe expanding. Even an estimate would be a good enough answer.
chroot said:Roughly 70 kilometers per second per megaparsec of distance.
http://en.wikipedia.org/wiki/Hubble_constant
- Warren
Universe expansion refers to the phenomenon in which the space between galaxies, clusters of galaxies, and other celestial bodies is increasing over time. This is believed to happen due to the force of dark energy, which counteracts the gravitational pull of matter.
The rate of universe expansion is measured by the Hubble constant, which is currently estimated to be around 70 kilometers per second per megaparsec. This means that for every 3.3 million light years, the universe is expanding by 70 kilometers per second.
Yes, the rate of universe expansion has changed over time. In the early stages of the universe, it was expanding at a much faster rate. However, as the universe ages and the effects of dark energy become more prominent, the expansion rate has slowed down.
Scientists use a variety of methods to measure the rate of universe expansion. One common method is using Type Ia supernovae, which are exploding stars with a consistent luminosity. By measuring the distance and redshift of these supernovae, scientists can calculate the expansion rate.
Based on current observations, it is believed that the universe will continue to expand forever. However, the rate of expansion may change over time. Some theories suggest that the expansion may eventually slow down and even reverse, leading to a "big crunch" where the universe collapses in on itself. However, more research is needed to fully understand the fate of the universe.