Star-land : being talks with young people about the wonders of the heavens (1891)
Ball, Robert S. (Robert Stawell), Sir, 1840-1913 · London ; Paris : Cassell & Co. · leaf 200
It appeared to him at lirst almost asif one of these little moons was playing at hide-and-seek.Sometimes it would peep out at one side of the planet,and sometimes at the other side. I have here a picture(Fig. 61) which shows how these moons of Mars revolve. The Inner Planets 185 That is the globe… … Fig. 01.—Mars and his two Satellites. iii 7 hours 39 minutes. It would seem very strange in oursky if we had a little moon which rose in the west insteadof in the east, and which galloped right across the heavensthree times every day. The outer moon takes a moreleisurely journey, for he requires 30…
Astronomy
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