Hydrogen core cluster species

An intelligent alien species composed of "hydrogen core clusters" lives in or around "a class nine star in G445 zone" in the same side of the Milky Way galaxy where humans live. They were described as "rather shy but sweet" but "wanting to be friendly again" by other two alien individuals and have tried to contact other species "two galactic rotation" before the dialogue between them takes place.

Appearances

 * Mentioned in They're Made Out of Meat (1991), short story by American writer Terry Bisson