To save the scientists some time (and fuel costs for the super-missile), Superman goes for the idea of personally delivering the research package to the interesting faraway planet.
Isn't it nice of Lois to recap the Yellow/Red sun-superpowers dichotomy? Keep that in mind. Yellow sun GOOD, red sun BAD (as Boris Karloff might say).
Package delivered, Superman heads back toiwards Earth, until ... by a strange twist of fate ...
Uh-oh, check out the final panel of this page. A yellow sun that looks like it's catching the measles cannot be good!
One hint ... reread the title of this comic-book story!