SUPERMAN 255 (August 1972)--"The Sun of Superman" by Bates, Swan and Anderson.
Out of Superman's past arrives a sun--into our solar system. He does not realize that this orange sun is his own Rao that gave him life all those years ago on Krypton. In fact, the Last Son soon learns that inside the sun are the sun-thrivers. For Rao was created by these energy beings--wherein they thrived.
And to keep their energy in perfect harmony, they spun off a planet that was Krypton. Now having lost its planet, Rao has shifted from red to orange and the sun-thrivers are not at peace, their energy erratic. They must have another planet, a new Krypton to restore harmony.
[continued in next post]