Black hole (The Krypton Syndrome)

The Arslycans used this black hole to dump Green Kryptonite, so as to aid Superman in ridding the universe of the element that is the most deadly to him. But in the process, they are nearly pulled in by the black hole's tremendous gravity. Superman manages to save them, but he and his Supermobile are pulled through the black hole and hurled back in time to when Krypton still existed.

Appearance
Super Friends
 * Lost Episode: The Krypton Syndrome