Source : Webster's Revised Unabridged Dictionary (1913)

Astronomer \As*tron"o*mer\, n. [See {Astronomy}.]
   1. An astrologer. [Obs.] --Shak.

   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.

Source : WordNet®

astronomer
     n : a physicist who studies astronomy [syn: {uranologist}, {stargazer}]