Stars and telescopes; a hand-book of popular astronomy, founded on the 9th ed. of Lynn's Celestial motions (1899)
Todd, David P. (David Peck), 1855-1939, Lynn, William Thynne, 1835-1911. Celestial motions · Boston, Little, Brown and company · leaf 152
nearly central Transits of Mercury are chiefly useful in physical observa-tions of the planet, its distance from the Earth being generallytoo great to allow its throwing any light on the problem of theSuns distance, although the May transits, when the planetcomes within 50,000,000 miles of the… … THE HEMISPHERES OF VENUS(NIESTEN AND stuyvaert) Venus moves in an orbit more nearly circular thanthat of any other of the principal planets, and her dis-tance from the Sun never varies much from 6 7\ mil-lions of miles. She revolves round him in 225 days.The inclination ofher orbit to theEarths is…
Astronomy
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