Universe B (The Jenny Everywhere Chronicles)
From Jenny Everywhere Wiki
When escaping the destruction of Julian's home planet by Nyx, Jenny Everywhere shifted Julian and herself to a universe with red skies, a volcanic terrain, and flying saucers patrolling the skies. This naturally did a pretty swift job of convincing Julian that there were other universes than his own, though he didn't look keen to stay. (COMIC: The Jenny Everywhere Chronicles)