The Species 10-C homeworld was a planet about thirty light years outside the galactic barrier of the Milky Way Galaxy, orbiting a single star. Formerly a gas giant and homeworld of Species 10-C, it was evacuated around the late 22nd century. (DIS: "The Galactic Barrier", "Rosetta")
Species 10-C evolved to move and communicate in the gas layers of this planet, using reinforced structures on the surface as a nursery. Around the late 22nd century, a barrage of massive asteroids burned the gas layers away, forcing Species 10-C to evacuate as many as they could, though some adults and young died on the surface, leaving their remains. The desert planet left behind maintained an ionosphere, which continued to produce heavy interference from asteroid debris.
In 3190, the USS Discovery's mission to make first contact with Species 10-C led it beyond the galactic barrier, and Dyson rings made of the same rare material as the DMA controller around this planet's star suggested the planet could be Species 10-C's homeworld. (DIS: "Rosetta")