The elements of theoretical and descriptive astronomy, for the use of colleges and academies (1901)
White, Charles J. (Charles Joyce), 1839-1917 · New York, J. Wiley & sons; · leaf 163
1890, nearly 300 of these minor planetshad been discovered. The earth is also a planet, lying betweenVftnus and Mars. It is therefore a superior planet to Mercuryand Venus, and an inferior planet to the other planets. Itssidereal period is greater than the periods of the inferior planets,and less… … Fig. 65. with the plane of the ecliptic, ABDE the orbit of the earth, andthe circle KGH the intersection of the plane of the ecliptic withthe celestial sphere. Suppose the earth to be at E. When theplanet is at P, between the earth and the sun, or at Pr, on theopposite side of the sun to the earth,…
Astronomy
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