Newcomb, Simon, 1835-1909 · New York, H. Holt & company · leaf 118
ASTRONOMY. 100 intersects the sphere. If this motion is toward the east, it is direct ; if toward the west, retrograde. The Apparent Motion of a Superior Planet. — In the figure let S be the sun, ABODE F the orbit of the earth, and HIKLMN the orbit of a superior planet, as Mars. When the earth is… … Fig. 34. the arcs AB, BC, etc., correspond to greater angles at the centre than HI, IK, etc. When the earth is at A, Mars will be seen on the celestial sphere at the apparent position 0. When the earth is at B, Mars will be seen at P. As the earth describes AB, Mars will appear to describe OP…
Astronomy
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
