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PHYS 1600 (13)

Week 11

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Department
Physics
Course
PHYS 1600
Professor
Mike Massa
Semester
Fall

Description
Astronomy Unit 11 GalaxiesINTROOur Home Galaxy Milky Way inside distribution of starsflat and disklike younger starsoutside distribution of starsspherical older starsOur Position in the GalaxyDetermined through study of Globular Clusters We are 23 away from center Disk partThe Mass of a GalaxyCan be determined by a galaxys rotation around its centerMost of a galaxys mass is in form of dark matter dark matters constitution is unknownThe Center of Our GalaxyTheres a black hole in the center of our galaxyprobably all galaxiesShapes of GalaxiesSpiralarmed elliptical irregularThe various shapes have different sizes and populations of starsMissing Mass ProblemProbably a universal problemWhy Because the rotation curves of all galaxies resembles oursHubble LawThe relationship between recession velocities of galaxies and their distances
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