The heavens above: a popular handbook of astronomy (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908 · New York, Chicago, Potter, Ainsworth, & Co. · leaf 234
only partially from the penumbra.The umbra is in the form of a cone, with its apex awayfrom the sun; though in the case of the earths shadowit tapers very slowly. The penumbra surrounds the umbra, ASTRONOMY. 2 I I and increases in size as we recede from the sun. The axisof the earths shadow lies in… … Fig. 231. and sometimes below, the ecliptic. It will He on the eclipticonly when the moon is at one of her nodes. 206. When there will be an Eclipse of ihe Mooti. —The moon is eclipsed whenever it passes into the timbraof the earths shadow. It will be seen from the figure thatthe moon can pass into…
Astronomy
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