Dark Gas Nebula

The Dark Gas Nebula is Hedorah's home world which appears in Godzilla vs. Hedorah.

Godzilla vs. Hedorah
The Dark Gas Nebula is an impenetrable cloud of gases in space which harbour countless numbers of Hedorah's species. It is possible that this cloud is composed of the chemicals which Hedorah feeds on and releases. A Comet passes through the Nebula, carrying a Hedorah to Earth, and beginning the Alien's threat to humankind.