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Galaxy Essay Topics & Paper Examples

Dark Energy, Dark Matter

In the early 1990’s, one thing was fairly certain about the expansion of the Universe. It might have enough energy density to stop its expansion and recollapse, it might have so little energy density that it would never stop expanding, but gravity was certain to slow the expansion as time went on. Granted, the slowing had not been observed, but, theoretically, the Universe had to slow. The Universe is full of matter and the attractive force of gravity pulls all matter together. Then came 1998 and the Hubble Space Telescope (HST) observations of very distant supernovae that showed that, a long time ago, the Universe was actually expanding more slowly than it is today. So the expansion of the Universe…

The Origin of the Universe

INTRODUCTIon The evolution of theories about the origin of the universe has surely proceeded at a rapid pace upon entering the 20th Century. New telescopic devices permitting people to see parts of the universe never before imagined, in new ways never before conceived, have advanced man’s theoretical capabilites on explaining the origin of the universe, a task that has been a part of intelligent man’s life for thousands of years. However, up until very recently, perhaps even this century, most of the theories of origin have been religious in nature. When we speak of having a religious nature, we speak of faith. Religious beliefs are held upon faith; no rational explanation is required or sought after. Examples would inlcude the…