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 154
hesun and earth, that the sides which they turn towards thesun and the earth in every part of their orbit are so nearlythe same, that no change in the form of their disks can bedetected. i*_ 135. The Syno die a 1 Pe rio dof a Superior Planet. — Dur-ing a synodical period of asuperior planet the… … Fig. 152. be in opposition again, me earth must make a complete revolution, and overtake theplanet, which has in the mean time passed on from Pto P\ In the case of most of the superior planets the synodicalperiod is shorter than the sidereal period: but in the caseof Mars it is longer, since Mars…
Astronomy
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