Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 102
, above, it may happenthat during the disappearance of the threesatellites, the fourth is between the Earthand the planet. Then the planet equallyappears solitary and deprived of its com-panions. Fig. 42 will render clear the various posi-tions which the satellite may occupy with refer-ence to the… … Fig. 41. JUPITER AND ITS FOUR SATELLITES. Q. How many satellites has Jupiter ? A. Four. Q. What are they called % A. Io, Europa, Ganymede and Callisto. Taking these satellites in the order of theirdistances, the times of their revolutions are asfollows: First satellite (Io) . . . 1 day, 18 hours,…
Astronomy
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