Observational Cosmology

Observational Cosmology - Observational Cosmology: World...

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Observational Cosmology: World Models and Classical Tests One of the fundamental questions of astronomy is "How did this all get here?" (Kleinmann 1988 private communication). This is deeply tied to observations bearing on the formation, evolution, and distribution of galaxies. First we develop some basic consideration on the "standard" big- bang picture, then deal with the relevant observations of the extragalactic universe. The Hubble expansion (conventionally interpreted as an expansion of spacetime with galaxies carried along for the ride) and cosmological principle together imply one of two kinds of universe: "Big Bang" - the universe is expanding from some initial configuration of (arbitrarily high) initial density. "Steady State" - involving a "perfect cosmological principle"; matter is being created and the expansion is driven by some long-range repulsive action. There are several immediately relevant data to help us choose a best bet scheme: Olbers' paradox Stellar and galaxy ages Microwave background
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This note was uploaded on 11/10/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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Observational Cosmology - Observational Cosmology: World...

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