alien, outer space, interplanetary, asteroid, interstellar, intergalactic, cometary, galactic, cosmic, planetary, interdimensional, supernatural, psychic phenomena, flying saucer, venusian, celestial, astral, oort cloud, earthlike, antimatter, jovian, lunar, paranormal, sentient, cryptozoological, transhuman, wormhole, interstellar space, earthly, uranian, unidentified flying object, antigravity, cosmic ray, otherworldly, cosmological, prehistoric, epsilon aurigae, exoplanet, nonhuman, astrophysical, cryptid, antarctic, percival lowell, microbial, terrestrial, asteroid belt, nonliving, demonic, primordial, archaeo, astronautical, cosmic radiation, precognitive, tycho brahe, circumstellar, reptilian, mysterious, nebular, magnetic monopole, polar, plutonian, subatomic particle, apparitional, quantum physics, orbiting, saturnian, unfathomed, undead, extragalactic, hypersonic, gall wasp, science fiction, noachian, cybernetic, elvish, occult, phyllosilicate, syrtis major, hadean, giant squid, cosmic rays, sapient, radial velocity, subaquatic, placental mammal, experiencer, biological, heisenberg uncertainty principle, mutant, earthbound, igneous, ratlike, chthonic, arachnid, biogenetic, batlike, unobservable, metaphysical, alpha centauri, geth, incorporeal, humanoid, inanimate, terrestial, nonnatural, subhuman, manipulable, nonphysical, prehuman, supersensible, etheric, extraneous

astrobiology, comet, cosmic ray, exobiology, flying saucer, meteor, meteoroid, space biology, ufo, unidentified flying object

hypothetical creature

alien, extraterrestrial being