Revolving around an X-Ray Star on the far side of the Pleiades, the planet Klaatu was once inhabited. The Silver Surfer, current Protector of the Universe, removed all life and energies from the planet to starve Galactus, the first planet of many he would do this to.
The planet, abandoned, later became the home of the former Avenger Vision. Uploading his mind to a massive computer system, he controlled the entire planet and became known as Main Frame. He also kept the shield of Captain America here.
After the destruction of the planet Haven, all of it's residents were moved to the planet.