Memoirs of the American Academy of Arts and Sciences, New Series, Vol. 12, No. 1, Catalogue of the Magnitudes of Southern Stars from 0° to -30° Declination, to the Magnitude 7.0 Inclusive (1893), pp.

was related to the star's magnitude, not distance. Yet magnitude itself allowed you to calculate distance. Leavitt published her findings in 1912 -- in a chart of 25 cepheid periods and their ...

Already 50° high an hour after sunset, the bright, magnitude 0.1 star Capella stands high above Mars and to Jupiter’s upper left. This is the alpha star of the constellation Auriga, which sits ...