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Another galaxy m31 not the milky way about 100 times

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Unformatted text preview: galaxy (M31 -NOT the Milky Way), about 100 times as far from us, as we are from the center of our own galaxy, the Milky Way. They look similar, so we’re probably in a galaxy like this one! 28 Stars, Galaxies and the Universe Side View of (a galaxy like) Maruša Bradač the Milky Way The “halo” is really the “stellar halo” – a ver y sparse, faint collection of ver y 29 old, metal po or stars. Stars, Galaxies and the Universe Maruša Bradač An artist’s view of the Milky Way Note the spiral pattern The Milky Way is an example of a type of galaxy known as a “spiral galaxy” or “disk galaxy” More on this later Why are the ar ms blue? 30 Stars, Galaxies and the Universe Maruša Bradač What do we see when we obser ve the Milky Way? The major “nor mal” components Stars Gas Dust } The Interstellar Medium (ISM) All of these are interrelate d. 31 Stars, Galaxies and the Universe Stellar components of the MW Maruša Bradač Disk (flat, circular distribution) All of the young stars are in the disk The gas an d dust also is in the disk Bulge (sphero idal distribution) Stellar halo (sphero idal distribution) old an d faint stars in the halo (sparse distribution) 32 Stars, Galaxies and the Universe Top View of (a galaxy like) Maruša Bradač the Milky Way The different components have different colors, motions, and chemical compositi...
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This note was uploaded on 02/19/2014 for the course AST 10G taught by Professor Lloydknox during the Spring '09 term at UC Davis.

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