Elements of astronomy ... with explanatory notes, and questions for examination (1855)
Brocklesby, John, 1811-1889 · New York, Farmer, Brace & co. · leaf 81
al portions of the illuminated hemisphere will beimmediately east and west of it. Then, and only then,has N reached the meridian plane, and the time of noonarrived. As the earth revolves through three hundredand sixty degrees in twenty-four hours, it passes throughone degree in four minutes, so… … SOLAR AND SIDEREAL DAY. How much longer is it? Explain from Fig. 28. 74 THE EARTH VIEWED ASTRONOMICALLY. the earth in two positions of its orbit; the dark semi-circles are sections of the unenlightened hemispheres,and the light semi-circles, sections of the enlightenedhemispheres. In position 1, it…
Astronomy
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