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 179
ect? 341. State the time of Mercurys revolution upon his axis? How doesthis compare with the Earth ? His period of revolution around the Sun ? 342. Whatsaid of discoveries upon Mercury, his phases, &c. ? What proof that he is opaque ? 178 ASTRONOMY heat as the Earth. The truth of this estimate,… … In this diagram the light is seen passing in right lines, from the sun on the left towardthe several planets on the right. It is also shown that the surfaces A, B, and C receiveequal quantities of light, though B is four times, and C nine times as large as A; and asthe light falling upon A is…
Constellations · Stars
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