The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 258
-two million miles, or forty-eightmillion miles. Owing to the eccentricity of the orbit ofthe earth and of Mars, the distance of this planet whenin opposition varies considerably. When the earth is inaphelion, and Mars in perihelion, at the time of opposition,the distance of the planet from the… … 236 ASTRONOMY. The mean distance of Mars from the earth when inconjunction is a hundred and forty million miles plusninety-two million miles, or two hundred and thirty-twomillion miles. It will therefore be seen that Mars is nearlyfive times as far off at conjunction as at opposition.
Astronomy
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