Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt and Company · leaf 510
udes are further away from us than those of the 7 (n — 1) magnitudes. We may have a kind of test of the truth of this hypothesis, and ofthe first employed, as follows : we had Dn_ _ y_Qn>«-l ~ >^ Qn- Dn Also from the first hypothesis the bricrhtness Bn of a st^r of the nth.magnitude in terms… … Dn I)n- Comparing the expression for —--—, in the two cases, we have V- Qn VJ - (-1-) If the value of 6 in this last expression comes near to the value whichhas been deduced for it from direct photometric measures of therelative intensity of various classes of stars, nz., (5 = 0-40, then thiswill…
Astronomy
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