A text-book of general astronomy : for colleges and scientific schools (1888)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston ; London : Ginn & Company · leaf 134
line SO, Fig. 58,directed towards the vernalequinox as the origin of longi-tudes. Lay off from S indefi-nite lines, making angles withSO equal to the earths longi-tude on each of the days ob-served through the year; i.e.,the angle OS 10, is the longi-tude at the time of the 10thobservation ; and so… … 11/ Fig. 58.Determination of the Form of the Earths Orbit, While the apparent diameter of the 122 CELESTIAL LATITUDE AND LONGITUDE. know the suns real diameter in miles, the changes in the apparentdiameter do inform us as to the relative distance of the earth atdifferent times, since the nearer we…
Astronomy
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
