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Is our galaxy one of the first

  1. Jun 22, 2005 #1
    To form, is it one of the oldest?
  2. jcsd
  3. Jun 22, 2005 #2
    Yes, it appears it is.

    http://www.eso.org/outreach/press-rel/pr-2004/pr-20-04.html [Broken]
    Last edited by a moderator: May 2, 2017
  4. Jun 23, 2005 #3


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    Good link, Vast. And that should not be surprising. Large spiral galaxies like ours appear to be quite mature.
  5. Jun 23, 2005 #4


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    Also note that today's MW galaxy is likely a very different critter than the one which formed soon after the Dark Ages ended. For starters, most of the stars which make us look like a spiral are very young; for seconds, we've been snacking on small fry galaxies from Day One, and we're still eating!
  6. Jun 23, 2005 #5
    Are "Milky-way" type of galaxies common?
  7. Jun 23, 2005 #6


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    According to http://www.astro.umd.edu/education/astro/gal/spiral.html [Broken] - Spirals are not the most common type of galaxy.
    Our neighboring Galaxy, M31 or Andromeda, is also a spiral galaxy. Both are in the Local Cluster.

    Milky Way Galaxy Wikipedia

    http://www.seds.org/messier/more/mw_arms.html [Broken]

    The Milky Way Galaxy - A Grand Design U. of Oregon

    http://www.absoluteastronomy.com/encyclopedia/S/Sp/Spiral_galaxy.htm [Broken]

    http://www.seds.org/messier/objects.html#galaxy [Broken]

    also on Wikipedia -

    List of Galaxies
    Groups or clusters of Galaxies
    Last edited by a moderator: May 2, 2017
  8. Jun 24, 2005 #7


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    Just wanted to note for clarity that, even though they're not the most common type of galaxy, spirals are not unusual. (i.e., not a rare type)
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