Science that studies the life forms of planets other than Earth.
It is the study of extraterrestrial life forms, or their possibilities. It has Greek origin, by 949; 958; 969; ( exo "out, external" ) 946; 953; 959; 962; ( bios , 'life , animation' ) 955; 959; 947; 953; 945; ( lodge "knowledge") . See biology.