Flammarion, Camille, 1842-1925, Lockyer, Winifred James, Mrs., d. 1879 · New York, C. Scribner & co. · leaf 175
dy. Hence it followsthat at certain epochs the planet Venus is exactly between usand the Sun ; and then it presents its dark part to us, as itsilluminated portion is naturally on the side of the Sun. Atother times, when it is to the right or left of the Sun, it pre-sents only a quarter. Lastly,… … Fig. 29. Variations of the apparent disk of Venus. is between us and the Sun), and contrary periods when itis 157 miUions of miles distant from us. Its apparent di-mensions then vary very perceptibly with its distance. Fig. 2dshows these variations. The phases of Venus were seen for the first time…
Astronomy
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