The call of the stars; a popular introduction to a knowledge of the starry skies with their romance and legend (1919)
Kippax, John R. (John Robert), 1849-1922 · New York, London, G. P. Putnam's sons · leaf 448
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 of Syrtis 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
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
