Newcomb, Simon, 1835-1909 · New York, H. Holt & company · leaf 320
se it is itself double. This minute pair of points, capable of being distinguished as double only by the most perfect eye (without the tele- scope), is really composed of two pairs Fia. 86.-THE QTTADRxrPLE Star of stars wide apart, with a group of « Lyr^. smaller stars between and around them. The… … Fig. 87. -Position-Angle op Double bers around the surrounding Star. circle then show the angle of position, supposing the smaller star to be in the direction of the number.
Astronomy
Internet Archive · The Library of Congress · Public domain (published before 1931). Free to use for anything.
