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A high-school astronomy: in which the descriptive, physical, and practical are combined .. (1859)
Mattison, Hiram, 1811-1868 · New York, Mason brothers · leaf 59
ude of a planet is itslongitude as viewed from the sun ; and the geocentric, itslongitude as viewed from the earth. Geocentric is from ge, the earth, and Jcentron, center; and h&ioeMitric from helios,the sun, and kentron, center. 91. Celestial longitude? Where begin to reckw. ? Blnsfrtln by… … In this cut, the planet B, when viewed from the earth at A, seems to be in the sign©; but when viewed from the sun, it appears to be in n. Again: when at C, herapparent longitude from the earth is in Tf|,; when from the sun, she appears to be in t.The learner will not only perceive the difference…Astronomy
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