The distance from earth of the red supergiant betelgeuse is approximately 643 light-years. if it were to explode as a supernova, it would be one of the brightest stars in the sky. right now, the brightest star other than the sun is sirius, with a luminosity of 26lsun and a distance of 8.6 light-years. part a how much brighter in our sky than sirius would the betelgeuse supernova be if it reached a maximum luminosity of 1.1×1010 lsun? express your answer using two significant figures.

1.5 Times.

Explanation:

The first step in order to solve the problem is to define our values, from this we can proceed to find the apparent brightness relationship for the two objects,

So,

B=Apparent Brightness

L= Luminosity

R=Radius

Then,

Under this relationship we can conclude that in the case of a Supernova, in our sky Betelgeuse Supernova would be times brighter than Sirius seen from the earth to the sky.

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