Interesting, but it IS a joke, which usually requires taking some liberties with the truth.
For example, an issue I have with it is that it's not actually possible for the Sun to explode. It is incapable of going nova. This is an old sci-fi trope, of a civilization that dies because its Sun goes nova, but this isn't a thing that actually happens. There are very specific circumstances where a nova can occur, and it is typically a recurring thing. More so, it requires the presence of a white dwarf star, which must come into existence only after a star has gone into a red giant phase. None of these things are conducive to life developing on nearby planets, they aren't even conducive to the continued existence of nearby planets. Regardless, our star is not a white dwarf, nor does it have a companion and therefore will never produce a nova. More so, it is about 1/8th too small to go supernova.
For example, an issue I have with it is that it's not actually possible for the Sun to explode. It is incapable of going nova. This is an old sci-fi trope, of a civilization that dies because its Sun goes nova, but this isn't a thing that actually happens. There are very specific circumstances where a nova can occur, and it is typically a recurring thing. More so, it requires the presence of a white dwarf star, which must come into existence only after a star has gone into a red giant phase. None of these things are conducive to life developing on nearby planets, they aren't even conducive to the continued existence of nearby planets. Regardless, our star is not a white dwarf, nor does it have a companion and therefore will never produce a nova. More so, it is about 1/8th too small to go supernova.