When an astronomer rambles on and on about the luminosity of a star she is studying, she is talking about:
A. what color the star is
B. the total amount of mass in the star
C. the star's apparent size (the size seen from Earth)
D. how much energy the star gives off each second
E. the elements she can see in the star's spectrum
I thought luminosity was referring to intrinsic brightness of star.
Would it be D?|||Luminosity is the total radiation given off, where the unit is set such that the Sun = 1. Thus other stars' luminosity will be easily compared.|||luminosity is the quantity of radiation emitted by a star
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