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Astronomy for students and general readers (1880)

Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York : H. Holt and company · leaf 492

An illustration from Astronomy for students and general readers, 1880, leaf 492
ng is a function of thevelocity of recession or ap-proach, and this velocity inmiles per second can becalculated from the meas-ured displacement. This has been done for many stars by Dr.HxTGGrNS, Dr. Vogbl, and Mr. Chkistie. Their results agree well,when the difficult nature of the research is… … Fig. 134.—^p-LDTE DT spectrum: ofsiRitrs. CHAPTER VI. MOTIONS AND DISTANCES OF THE STAKS.§ 1. PROPER MOTIONS. We have already stated that, to the unaided vision, thefixed stars appear to preserve the same relative position inthe heavens through many centuries, so that if the an-cient astronomers…

Astronomy

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