Astronomy, a handy manual for students and others (1918)
Dyson, Frank Watson, Sir, 1868-1939 · New York, E.P. Dutton & Co. · leaf 34
Diag. x. ANCIENT ASTRONOMY 23 ecliptic are not fixed but move round in a periodof 19 years. Thus in Diagram XI, if N1AM1B is theecliptic, and N1CM1D the Moons orbit; the anglesat Nx and M± were found to be 50; and the points Nx, … Diag. XI. M1 carrying the circle N1CM1D with them movedround N1AM1B in 19 years. Perhaps the most famous of the discoveries ofHipparchus is that of the precession of the equinoxes.In the year 134 B.C. the appearance of a new starin the constellation Scorpio led Hipparchus to makea catalogue of 1080…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
