system
Given the following post, respond as if you're commenting on Reddit:
human
[Superman] Could Krypton have been saved?

I've seen a few threads that deal with the possibility of Krypton being saved, either by a Green Lantern or a time traveler or some other method. But... Even if it were possible for someone with extreme superpowers to get to Krypton in time, what could they have done?

I can see a mass evacuation being somewhat successful, but the planet itself is boned, right? Most likely with extreme loss of life?

And even if you did evacuate, Yellow Suns seem to be more common than Red ones, so have you just filled the universe with a bunch of Supermen, many of whom may not have the morals that Kal-El did? 

Please advise.
gpt
A popular way for heroes to 'save' Krypton is to hammer lead rods into the core, rather like a nuclear reactor. Kal-El did this once with a Green Lantern ring in one Elseworld, and Tomar-Re planned on doing it before he got blinded by a supernova and recovered in time to see the planet explode.