The luminosity of a star is a unique measure of its __________?

Answer 1

Energy.

Luminosity of a star is a measure of its energy compared to the sun: http://en.wikipedia.org/wiki/Luminosity

Answer 2

The luminosity of a star is a unique measure of its total energy output per second.

Answer 3

In astronomy, luminosity is the quantity of ability a body radiates in line with unit time. The luminosity of stars is measured in 2 varieties: obtrusive (counting seen mild purely) and bolometric (finished radiant ability); a bolometer is an device that measures radiant ability over a great band with the aid of absorption and length of heating. at the same time as no longer qualified, luminosity ability bolometric luminosity, that is measured contained in the SI gadgets watts, or in words of image voltaic luminosities, L_{odot} ; that is, what percentage situations as a lot ability the article radiates than the solar, whose luminosity is 3.ninety×1026 W. Luminosity is an intrinsic consistent self sustaining of distance, and is measured as absolute importance reminiscent of obtrusive luminosity, or bolometric importance reminiscent of bolometric luminosity. compared, obtrusive brightness is correct to distance with the aid of an inverse sq. regulation. seen brightness is in many situations measured with the aid of obtrusive importance, that is on a logarithmic scale. In measuring megastar brightnesses, seen luminosity (no longer finished luminosity in any respect wave lengths), obtrusive importance (seen brightness), and distance are interrelated parameters. in case you understand two, you may make certain the third. because the solar's luminosity is the universal, comparing those parameters with the solar's obtrusive importance and distance is the way in which to keep in ideas the thanks to remodel between them.

Answer 4

Magnitude

Answer 5

brightness