Rubble

A Danny Phantom Space AU.

Humanity has expanded into the stars. Alien planets are now within our reach. After years of culture shock, language barriers, and political reform, the Space Corps is founded. An interplanetary organizations to protect culture, and police the system. Aliens from hundreds of planets are accepted. But the Space Corps was too late to save the planet Halpha, or any of its inhabitants from a brutal annihilation.
Or so they thought.

Cover art by emls479 on deviantart