A1S1T1R1O1M3E1T1R1Y4
15 points
ASTROMETRY is validvalid
[n ASTROMETRIES]
the art of making measurements among the stars, or of determining their relative magnitudes [n ASTROMETRIES]
[n ASTROMETRIES]
the art of making measurements among the stars, or of determining their relative magnitudes [n ASTROMETRIES]