Jones, H. Spencer (Harold Spencer), 1890- · London E. Arnold & co. · leaf 244
s law is thus : (if + m)T2: {M + m^)Ty^ = a^: a^^m, nil, ^ being the masses of the two planets and of the Sun. 117. Apparent Motions of the Planets.—The apparentmotions of the planets as seen from the Earth are the resultantof the actual motion of the planet around the Sun and anapparent motion due… … W. Quadrature Fig. 75.- Opposition-Planetary Configurations. Certain terms commonly used in connection with planetarymotions must first be defined. When the planet is in a linewith the Sun and the Earth, it is said to be in Superior Con-junction ; when an inferior planet (i.e., a planet whose orbit…
Astronomy
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