xenocytology
xenoengineering
xenoscience
extraterrestrialization
xenomorphology
xenomicrobiology
xenophysics
xenotechnology
xenogeology
cosmogenous
xenobiochemistry
xenobacteriology
xenochemistry
exobiology
space biology
astrobiology
alienkind
xenobiology
xenopaleontology
space invader
xeno-
exocommunication
aerocellular
extraterrene
ultratelluric
extramundane
xenoarchitecture
extraplanetary
space alien
xenoarchaeology
bug-eyed monster
astrohistory
xenohistory
ultramundane
extraterrestriality
eetee
alienesque
cytobiology
stars
heterocellular
unidentified flying object
flying saucer
spacy
UFO
substar
autoploid
embryoniclike
entosis
extracellulase
micrometeoroid