The term "space inhabitant" refers to any being that is capable of surviving and living in the harsh conditions of outer space. There are various synonyms for space inhabitant, including extraterrestrial, space alien, celestial being, space creature, astronaut, cosmonaut, spacer, and starperson. These synonyms convey the concept of a life-form or entity that exists outside our planet's atmosphere. Extraterrestrial often denotes an intelligent alien life form, while space creature and celestial being suggest a non-human species. Astronaut and cosmonaut signify a human individual who has traveled to space or resides on a space station. Spacer and starperson are generic terms that describe any space-dwelling being.