the luminosity of the sun mesured in watts is a big number so heres something a little simpler 3.839 × 1026 W
Betelgeuse has about 140,000 times the luminosity of our sun or about 5.37×1031 watts.
It really depends on the units used. Sometimes the Sun is used as a comparison for the brightness of other stars, or even galaxies - in this case, the Sun's luminosity is arbitrarily defined as 1, and a star that is 10 times brighter will have luminosity 10, for example. However, if you use other units, for example watts, you get quite different numbers (3.846×1026 watts for the Sun, according to the Wikipedia).
The absolute luminosity is about 3.839×1026 W, or 3.839×1033 erg/second. The comparative luminosity of an astronomical object is based on the Sun, so it has a relative luminosity of 1.
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The Sun is the main basis for many stellar parameters. A far as luminosity goes - it is 1.
It's luminosity is: 3.846×1026 Watts
Betelgeuse has about 140,000 times the luminosity of our sun or about 5.37×1031 watts.
The Sun's luminosity is 3.846 × 10 ^26 Watts.
It really depends on the units used. Sometimes the Sun is used as a comparison for the brightness of other stars, or even galaxies - in this case, the Sun's luminosity is arbitrarily defined as 1, and a star that is 10 times brighter will have luminosity 10, for example. However, if you use other units, for example watts, you get quite different numbers (3.846×1026 watts for the Sun, according to the Wikipedia).
The answer is : watts
A star's luminosity is measured according to the relevance to the sun. Basically for example, if a star is 8,300 degrees Celsius and has a luminosity of 0.001; the luminosity is compared to the sun.
The absolute luminosity is about 3.839×1026 W, or 3.839×1033 erg/second. The comparative luminosity of an astronomical object is based on the Sun, so it has a relative luminosity of 1.
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The Sun is the main basis for many stellar parameters. A far as luminosity goes - it is 1.
The main star in the Polaris system has a luminosity which is 2500 times that of the Sun.
Deneb has a luminosity (apparent magnitude) of 1.25. However, in bolometric luminosity (solar units) Deneb is 54,000, whereas our Sun is 1.
3.826x1026 is the luminosity, in Joules/second, of our sun.