资料来源 : pyDict

天体测定

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Astrometry \As*trom"e*try\, n. [Astro- + metry.]
   The art of making measurements among the stars, or of
   determining their relative magnitudes.

资料来源 : WordNet®

astrometry
     n : the branch of astronomy that deals with the measurement of
         the position and motion of celestial bodies