Planet Herschel is a world in the Gamma Serpentis star system.
It was the location of a rebellion stronghold featured in Space Pilgrim Episode II: Epsilon Indi. Doctor Enver Balik did at least some of his work creating the android Emet on this planet.
Emet mentions that the only predators on the planet are gigantic sea monsters, and that some areas of this world are in a perpetual state of dusk. Leila Barret says that the planet's gravity is higher than that of Earth.