Recreations in astronomy : with directions for practical experiments and telescopic work (1879)
Warren, Henry White, 1831-1912 · New York : Harper & Brothers · leaf 177
at opposition be1,000 miles apart. But Mars at perihelion maybe only 128,000,000 miles from the sun, and earth at 160 A SOLAR SYSTEM. aphelion may be 94,000,000 miles from the sun. Theyare, then, but 34,000,000 miles apart. This favorableopportunity occurs about once in seventy-nine yeaAt its last… … Fig. 69.—Apparent Size of Man at Moan and Extreme Dial I Take a favorable time when the planet is near, alsonear overhead as it ever comes, so as to have as littleatmosphere as possible to penetrate, and study the plan-et. The first thing that strikes the observer is a daz-zling spot of white near…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
