Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York (etc.) Ginn and Company · leaf 326
cted for precession, aberration, etc. The operationis, however, a very easy one with modern tables and formulae, involv-ing perhaps from five to ten minutes work. 425. Star-Charts and Stellar Photography. — For some pur-poses, accurate st&i-charts are even more useful -than cata-logues. The… … FlG. 105. — Photographic Telescope of the Paris Observatory. § 425) PROPER MOTIONS. 309 are continually reached. With the ordinary plates and expo-sure-times not exceeding twenty minutes, it is now possibleto get distinct impressions of stars that the eye cannot pos-sibly see with the telescope…
Astronomy · Constellations
Internet Archive Book Images · The Library of Congress · No known copyright restrictions (public domain). Free to use for anything.
