If a supernova exploded 26,000 light-years away at the center of our galaxy, how visible would it be on Earth?
Answer
It would still be bright enough to be seen in daylight here on Earth.
The immense inherent energy release of a supernova dictates that even events occurring at great distances remain remarkably visible. A supernova exploding at the galactic center, estimated to be roughly 26,000 light-years away from Earth, would still generate enough light to be prominently visible against the daytime sky on our planet. This capability to shine so brightly over vast cosmic distances underscores the difference in magnitude between a supernova and a nova, which may only be visible across significant stretches of the galaxy but not nearly with the intensity of a stellar death explosion at that range.
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How Common Are Novae? - Physics Frontier - YouTube
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