Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 110
good instruments and under favorable circum-stances.Q. When is the best time to take a view of them?A. When the planet is at its Equinox, then the rings are nearly invisible. Q. How do these satellites revolve ? A. They revolve eastward with the rings of theplanets ; in orbits nearly circular, and,… … WEED, PARSONS 8. CO. ALBANY, N Time, photo- URANUS AND THE EARTH COMPARATIVE DIMENSIONS. ELECTRO-ASTRONOMICAL ATLAS. Distances la Mile Periodic fme Mimas . 123,000 . 00 days , 22 hours. Enceladus 128,000 . 1 * 8 Tethys . 190,000 . 1 21 Dione 251,000 . 2 17 Rhea 351,000 . 4 12 55 seconds Titan .…
Astronomy
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