Thursday, March 16, 2006
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Universe - Wikipedia, the free encyclopedia
Universe - Wikipedia, the free encyclopedia: "There is disagreement over whether the universe is indeed finite or infinite in spatial extent and volume.
However, the observable universe, consisting of all locations that could have affected us since the Big Bang given the finite speed of light, is certainly finite. The edge of the cosmic light horizon is 13.7 billion light years distant. The present distance (comoving distance) to the edge of the observable universe is larger, due to the ever increasing rate at which the universe has been expanding; it is estimated to be about 78 billion light years. The observable universe contains about 7^1022 stars, organized in about 100 billion galaxies, which themselves form clusters and superclusters. The number of galaxies may be even larger, based on the Hubble Deep Field observed with the Hubble Space Telescope. The Hubble Space Telescope discovered galaxies such as Abell 1835 IR1916, which are over 13 billion light years from Earth."
FYI:
A light year is how far light can travel in a year: 5,865,696,000,000 miles a year.








