The geography of the heavens, and class book of astronomy: (1853)
Burritt, Elijah H. (Elijah Hinsdale), 1794-1838, Mattison, Hiram, 1811-1868, Dick, Thomas, 1774-1857. [from old catalog] · New York, F. J. Huntington [etc.] · leaf 233
hs shadow throughwhich she passes. When an eclipse of the Moon is both total and central, itsduration is the longest possible, amounting nearly to 4 hours ; but the durationof all eclipses not central varies with her distance from the node. In what circumstances is the. duration of the lunar… … The diameter o£ the Earths shadow, at the distance 01Ihe Moon, is nearly three times as large as the diameter otthe Moon; and the length of the Earths shadow is nearly fourtimes as great as the distance of the Moon; exceeding it inthe same ratio that the diameter of the Earth does the dia-meter of…
Constellations · Stars
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