Lockyer, Norman, Sir, 1836-1920 · London : Macmillan and Co. · leaf 136
mpared withTHE Earth. Physical Description of Mars. 251. We are now in a position to examine the otheiplanets of our system, and to bring the facts taught us byour own to bear upon them. In the case of all the planetswe have been able to ascertain the facts necessary to de-termine the elements of… … THE SOLAR SYSTEM. 105 shape of the orbit depends upon the degree of its elHpticity—for all are elliptical—and its position upon the distanceof the planet from the Sun, and the degree in which theplane of each orbit departs from our own. When wehave, in addition to these particulars, the position of…
Astronomy · Solar system
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