Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 259
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. … Fig. 264. 237. The Apparent Size of Mars, — Owing to the vary-ing distance of Mars from the earth, the apparent size ofthe planet varies almost as much as that of Venus. Fig.264 shows the apparent size of Mars at its extreme andmean distances from the earth. The apparent diametervaries from about…
Astronomy
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