The geography of the heavens, and class-book of astronomy: (1858)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 222
e, a solar eclipse only to a small portion of it. 447. All parts of a planets shadow are not alike dense. The 446. Where must the Moon be, with respect to the ecliptic and her nodes, in order toan eclipse ? What meant by ecliptic limits t Name the distance of each, respectively,from the node.… … Penumbra is from the Latin pene, almost, and umbra, a shadow. In this cut, theEarths umbra and penumbra will be readily found by the lettering ; while A is the umbra,and B B the penumbra, of the Moon. The latter is more broad than it should be, owingto the nearness of the Sun in the cut, as it…
Constellations · Stars
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