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23 May, 19:15

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.

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  1. 23 May, 20:40
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    Answer: The brightness of our if betelgeuse were to explode as as a supernova would by getting the ratio betelgeuse to sirius. Which would then be:

    Apparent brightness of Betelgeuse

    : Apparent brightness of Sirius=

    6.9*10^4 Lsun.
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