Book excerpt: When Doomsday arrives on Earth, the Man of Steel knows he must get his deadliest enemy as far from the planet as possible. Join Superman as he takes Doomsday to the very edges of our solar system, and along the way learn real-world science facts about Neptune, the farthest planet from the Sun. With an exciting mix of fiction and nonfiction content, kids can explore outer space with DC Comics' legendary super hero in this fun, action-packed introduction to Neptune.