Kippax, John Robert, 1849- [from old catalog] · New York and London, G. P. Putnam's sons · leaf 452
t, and 154,000,000 miles whenfarthest away. Its motion varies in different portionsof its orbit, but the average velocity is fifteen milesa second, and it travels over about four-tenths of adegree in the heavens in a day. It receives on theaverage less than half as much solar light and heatas does… … Yerkes Observatory Plate XXXIV. The Planet Mars, Region ofSyrtis Major(Showing change due to rotation) Mars and the Planetoids 367 into opposition every 780 days. This constitutes itssynodic period, which is by far the longest in theplanetary system. At the average opposition theplanet approaches…
Stars · Constellations · Planets
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