as·tron·o·mer /əˈstrɑnəmɚ/
  天文學家
  As·tron·o·mer n.
  1. An astrologer. [Obs.]
  2. One who is versed in astronomy; one who has a knowledge of the laws of the heavenly orbs, or the principles by which their motions are regulated, with their various phenomena.
     An undevout astronomer is mad.   --Young.
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  astronomer
       n : a physicist who studies astronomy [syn: uranologist, stargazer]