A short course in astronomy and the use of the globes (1871)
Kiddle, Henry, 1824-1891 · New York, Chicago, Ivison, Blakeman, Taylor & co. · leaf 75
ion, between its extreme elonga-tions and inferior conjunction. This is caused by thedirection of its motion at these two points, it beingoblique to the motion of the earth; so that, notwith-standing the difference in their velocities, the planet andearth appear to move on together. 97. The motion… … APPARENT MOTIONS OF VENUS AND MERCURY. 96. At what points is a planet stationary ? How is this caused? 97. When isthe motion of an inferior planet retrograde ? Illustrate from the diagram. A P P ARE X T 3I0TI0XS 0 B\ THE P LA XE TS. 73 Let S in the annexed diagram be the place of the sun, the…
Astronomy
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