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Cosmology Spiral Galaxy
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Includes a disk, bulge, and halo. The study of the structure and evolution of the universe.
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Spheroidal Component Disk Component
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Part of a spiral galaxy that includes stars of all ages and many gas clouds. Part of a spiral galaxy that includes the bulge and halo, old stars, and a few gas clouds.
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Red-Yellow Color Blue-White Color
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Indicates ongoing star formation. Indicates older star population.
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Lenticular Galaxy Barred Spiral Galaxy
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Has a bar of stars across the bulge. Has a disk like a spiral galaxy but much less dusty gas; intermediate between spiral and elliptical galaxies).
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Irregular Galaxy Elliptical Galaxy
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All spheroidal component, virtually without a disk component. Neither spiral nor elliptical; sometimes caused by the collision of galaxies.
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Elliptical Galaxies Spiral Galaxies
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Often found in groups of galaxies (up to a few dozen). Much more common in huge clusters of galaxies (hundred to thousands).
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Parallax Radar
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Measure time for light to bounce back from
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This note was uploaded on 08/30/2011 for the course AST 2002 taught by Professor Britt during the Spring '08 term at University of Central Florida.

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