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Astronomy for high schools and colleges (1889)
Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 457
MMMRMOSOSMMMMi-iMt-»-0000C0C0O?COiCOS0C^J^J<Ji^rf^O5CC>h^.tO^Ji-0COTi-i 1 1 © 03tSt»t2t3^<J<>COtS05CClOtCiCOOTOS<fOT*>»*^^COCO 1 1 0 0 «o CCi^^WtStOCO^C^WCO^OOOSCTJOO^OTCO^^tOOSCCOOtOCO-^torf^-^rf^COOOOOfcOOOCOCOOOOTl-^COGOtO-^O 1 1 c o OS… … BRIGHTNESS OF THE STARS. 439 that the brightness of an average star of the first magnitude isabout 0-5 of that of a Lyrce. A star of the 2d magnitude will shinewith a light expressed by 0-5 x 0-4=0-20, and so on. The total brightness of 10 1st magnitude stars is 5-0 M M 37 2d 7-4 t* M 122 3d 10-1…Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
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