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 317
WAY IN SAGITTARIUS (R. A. = l8h IOm. DECL. = S. 20°)(Photographed by Professor Barnard at the Lick Observatory. Exposure, \\ hours) 258 Stars and Telescopes Another star, as bright at one time as the planetVenus, is said to have appeared in the year a. d. 389 an exceedingly accurate observer of… … THE MERIDIAN PHOTOMETER OF HARVARD COLLEGE OBSERVATORY {Devised by Professor Edward C. Pickering, and used under his direction in determifiing the magnitude of all the bright stars in the entire sky) Stellar photometers are of varied designs. Pritchard useda so-called wedge photometer, in which a…
Astronomy
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