Evolution of the universe and good science

Evolution of the universe and good science - Questions for...

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Questions for Application Week 2: Evolution of the Universe and Good Science 1. Definitions A. Big Bang theory: the cosmic explosion that is hypothesized to have marked the origin of the universe Tracing this movement back through time takes all matter to a single point, leading to the view that at one time all matter was concentrated in a singularity which for some unknown reason exploded, throwing all material now seen in the universe outward from that central point. The theory asserts that our entire universe was created when a tiny (billions of times smaller than a proton ), super- dense, super-hot mass exploded and began expanding very rapidly, eventually cooling and forming into the stars and galaxies with which we are familiar. the event of the Big Bang was space itself expanding - perhaps at speeds greater than light. http://www.wisegeek.com/what-is-the-big-bang-theory.htm At the point of this event, all of the matter and energy of space was contained at one point. What exisisted prior to this event is completely unknown and is a matter of pure speculation. This occurrence was not a conventional explosion but rather an event filling all of space with all of the particles of the embryonic universe rushing away from each other. The Big Bang actually consisted of an explosion of space within itself unlike an explosion of a bomb were fragments are thrown outward. The galaxies were not all clumped together, but rather the Big Bang lay the foundations for the universe. B. Nebular Hypothesis: the theory that the solar system evolved from a hot gaseous nebula Planet formation was first discussed by Immanuel Kent in 1755. Kant proposed that a nebulae , which is a huge cloud of dust and gas, was pulled together by gravity so that it collapsed into a flat, rotating disk. The disk eventually coalesced into the Sun and planets. Kant also stated that because a similar process occurs around other stars, our Solar System is not alone in the universe. After many failures, such as the encounter theory, astronomers returned to the nebular hypothesis to find improvements during the mid 1900s. Despite the protoplanet theory's success in correcting problems with the nebular hypothesis, it did not provide an explanation for the distribution of angular momentum in the Solar System. To explain the transfer of angular momentum from the Sun to the planets, scientists proposed a braking action caused by the Sun's magnetic forces. The magnetic lines of force from the Sun transferred angular momentum from the spinning Sun to the planetary disk. With the addition of this proposal, the proto – planet hypothesis became free of any known faults. Laplace supposed the existence of a primeval
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This note was uploaded on 06/14/2011 for the course PHSC 1001 taught by Professor Gabrielclay during the Fall '09 term at Walden University.

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Evolution of the universe and good science - Questions for...

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