Young, Charles A. (Charles Augustus), 1834-1908, Young, Anne Sewell, b. 1871., ed · Boston, New York [etc.] Ginn and Company · leaf 330
s cross motion, which involvesa knowledge of the distance of the star. For the most part these motions of the stars, so far as at pres-ent ascertained, seem to range between zero and 25 or 30 milesa second, with still higher speeds in a few exceptional cases. 430. The Suns Way. — The proper motions… … 4400 4600 Fig. 107. § 430] PARALLAX AND DISTANCE OF STARS. 313 Herschel was the first to investigate and determine the direc-tion of this motion a century ago. The principle involved is this: The motion of a star relativeto the solar system is made up of its own real motion combinedwith the suns…
Astronomy · Constellations
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