system
Given the following post, respond as if you're commenting on Reddit:
human
[DC] Where was krypton's Green Lantern when it was destroyed?

I'm just genuinely curious if the Lantern Corps are supposed to protect planets why didn't the Green Lanterns protect Krypton from getting destroyed? Has there ever been answer to this in the comics?
gpt
Tomar-Re is the Green Lantern who tries to save Krypton, but he's briefly blinded by a solar flare during the act, and sees the planet explode when his vision returns.

He's basically devastated by this and considers it his greatest failure, but still carries out his duties as a Lantern Corp anyway.