Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 134
whena planet is in conjunction, it is between the earth and thesun, the conjunction is said to be an inferior one ; if be-yond the sun, it is said to be superior. Arrangements and Motions of the Planets.—We nowknow that the sun is the real centre of the solar system,and that the planets proper all… … Fig. 48.—orbits of the planets. in the same plane. The planets Mercury and Venuswhich, as seen from the earth, never appear to recede veryfar from the sun, are in reaUtj those which revolve inside 116 ASTRONOMY. the orbit of the earth. The planets of the third class,which perform their circuits a,t…
Astronomy
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