How do the stars in the disk of our galaxy move?

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    They orbit around the galactic center in the same way as if the galaxy were a solid disk, with stars near the center taking the same time to make a complete orbit as stars that are farther out.
     They orbit around the galactic center differentially, with stars near the center taking less time to make a complete orbit than stars that are farther out.
     They move around in local eddies that are continuously swept along spiral arms toward the galactic center.
     They have quite elliptical orbits in general that tend to have a great variation in distance from the galactic center.
     They move in random directions with respect to each other and the galactic center, with each orbit different than the rest.
asked Sep 20, 2012 in Astronomy by anonymous
    

1 Answer

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They orbit around the galactic center differentially, with stars near the center taking less time to make a complete orbit than stars that are farther out.
answered Sep 22, 2012 by SkyStar ~Expert~ (2,855 points)



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