Elementary astronomy; a beginner's text-book (1899)
Holden, Edward Singleton, 1846-1914 · New York, H. Holt and company · leaf 322
lanet approachesthe Earth, and that the planets di-ameter subtends a larger angle. ^1G- 172. — Apparent Di-ameter of Mercury ; A, Phases of Mercury and Venus. f «TR™ £SiWhen the planet is at its greatest 0, at Least Distance.distance, or in superior conjunction (6, Fig. 171), itswhole illuminated… … 302 ASTRONOMY. sphere is visible, and the planet has the form of the Moonat first or second quarter. As it approaches inferior con-junction, the apparent visible disk assumes the form ofa crescent, which becomes thinner and thinner as theplanet approaches the Sun. (See Fig. 174.)
Astronomy
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