Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 468
ach ofthe two stars which compose it isitself double. No more strikingidea of the power of the teles-cope can be formed than bypointing a powerful instrumentupon this object. It ^vill thenbe seen that this minute pair ofpoints, capable of being distin-guished only by the most perfecteye, is really… … 450 ABTnomMY. Revolutions of Double Stars—Binary Systems.— The most interesting question suggested by double stars is thatof their relative motion. It is evident that if thesebodies are endowed with the property of mutual gravita-tion, they must be revolving around each other, as theearth and…
Astronomy
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