Astronomers find the edge of the Milky Way(skyandtelescope.org)
70 pointsby bookofjoe6 hours ago4 comments
  • dotancohen4 hours ago
    Is this a non-sequiter or just poorly phrased?

      > Disk galaxies like the Milky Way form stars “inside-out” — starting from the center and working outwards through the disk. So, as a general rule, the farther out astronomers look, the younger the stars are.
    Do they meant looking out from Earth (which is actually nearer to the center of a spiral arm than to either end) or out from the galactic bulge. Either way doesn't make sense.
    • 40 minutes ago
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    • ww520an hour ago
      Looking from Earth at the stars closer to the center of a galaxy, they are found to be older. Looking from Earth at the stars closer to the edge of a galaxy, they are found to be younger.
    • _factor3 hours ago
      Poorly phrased. The most recent stars are on the edges. The inner stars were first, hence the “working outwards”.
    • malfist2 hours ago
      When does "starting in the center" mean anything besides "starting in the center"?

      The earth is not the center of the galaxy

      • assimpleaspossi43 minutes ago
        He didn't say that. He said earth is nearer to the center of a spiral arm.
    • happytoexplain2 hours ago
      I actually am not following what the ambiguity is - stars farther out from the center are younger, no?
      • kadoban2 hours ago
        The Earth isn't the center of the galaxy, so this feels confusing/confused:

        > So, as a general rule, the farther out astronomers look, the younger the stars are.

    • JumpCrisscross2 hours ago
      Try: "the farther out [from the center] astronomers look"
    • colechristensen3 hours ago
      It is beyond obvious what they mean.
    • layer83 hours ago
      [dead]
  • neals4 hours ago
    Just the daily post that makes me feel small and insignificant.
    • dylan6044 hours ago
      I prefer that feeling much more than the modern sense from social media where everyone is abnormally important
  • yrcyrc3 hours ago
    Great. Next Laniakea