I'm still convinced that the Oans dropped the ball on this one...
Where was the Green Lantern of the Krypton sector of planets when it exploded?
—Michael Aaron Frandy
Bob Rozakis (http://en.wikipedia.org/wiki/Bob_Rozakis) answers:
As coincidence would have it - assuming you believe that there are coincidences in comic books - the Green Lantern assigned to the space sector in which Krypton was located was Hal Jordan's old pal, orange-skinned, bird-beaked Tomar-Re. As recounted in "The Greatest Green Lantern of All" in SUPERMAN #257, the Guardians were aware of Krypton's peril and had Tomar-Re working behind the scenes to delay the planet's destruction.
Unfortunately, Tomar-Re was blinded on an unrelated mission and was unable to do anything as the planet reached critical mass and exploded. He counted this as his greatest failure until years later, when the Guardians told him of the lone child who had escaped the doomed planet and had grown up to be the greatest hero in the universe.