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 278
e names of these satellites, in the order of their dis-tance from the planet, are lo, Europa, Ganymede, and Cat- ASTRONOMY. 25I Hi to. Their times of revolution range from about a dayand three-fourths up to about sixteen days and a half.Their orbits are shown in Fig. 280. 257. The Variability of… … Fig. 280. they always present the same face to the planet, and thatthe changes in their brilliancy are due to differences in theluminosity of parts of their surface which are successivelyturned towards us during a revolution; but careful measure-ments of their light show that this hypothesis does…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
