Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 457
t3C5 0Cii--OOOCOQQO*^*>.«OCX)-;2-3»-pH-COtO … BRI0HTNES8 OF THE STARS. 439 that the brightness of an average star of the first magnitude isabout 0-5 of that of a Jjyrm. A star of the 2d magnitude will shinewith a light expressed by 0-5x0-4=0-20, and so on. The total brightness of 10 1st magnitude b37 2d 122 3d 310 4th 1,016 5th 4,322 6th…
Astronomy
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