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chap 12 new-v4 - The Milky Way Almost everything we see in...

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The Milky Way Almost everything we see in the night sky belongs to the Milky Way. We see most of the Milky Way as a faint band of light across the sky. From outside, our Milky Way might very much look like our cosmic neighbor, the Andromeda Galaxy.
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Southern sky Milky Way in binoculars on Dec. 9, 1985 showing also Halley’s comet.
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Determining the Structure of the Milky Way Galactic Plane Galactic Center The structure of our Milky Way is hard to determine because: 1) We are inside. 2) Distance measurements are difficult. 3) Our view towards the center is obscured by gas and dust.
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