In astronomy, luminosity is the power (amount of energy per unit of time) emitted in all directions by a celestial body. It is directly related to the absolute magnitude of the star. The luminosity of the Sun, Lā is the classical unit used in astronomy to compare the luminosity of other stars. Its approximate value is:
[tex]L=3.827\times10^{26}W[/tex]
From the options, the correct one is:
A. Sun
