Exobiology (also called astrobiology or xenobiology) was the biological science concerned with living alien organisms. Exobiology was also taught at Starfleet Academy. A biologist who specialized in the field of exobiology was referred to as an exobiologist, xenobiologist, or astrobiologist.
Still, Archer had received exobiology training prior to his captaincy of Enterprise NX-01 in 2151, so he knew statistically only one of 43,000 planets supported intelligent life. (ENT: "Fight or Flight")
Planet-side, Mulhall's role on the mission included, but was not limited to, taking tricorder readings of the underground complex's atmosphere and composition of the alloys used in its construction, as well as observing James T. Kirk's reaction of euphoria, when his body became inhabited by Sargon.
Later, Mulhall was willing to offer herself as a receptacle for Thalassa, justifying the opportunity with stating, "I'm a scientist. The opportunity is an extraordinary one for experimentation [and] observation." (TOS: "Return to Tomorrow")
In 2375, The Doctor wished to consult a database on exobiology when a cytoplasmic lifeform attached itself to B'Elanna Torres. He instead ended up creating a hologram of Crell Moset (Medical Consultant Program Beta one), a Cardassian exobiologist. (VOY: "Nothing Human")
Later that year, when The Doctor gave Qatai information on how to improve his shields, Qatai commented The Doctor seemed to know a little about everything including exobiology, medicine and shield harmonics. (VOY: "Bliss")
- Astrobiology/Exobiology department
- Circle of Exobiology
- Exobiology Research Division
- Federation Council on Exobiology
According to a deleted scene in TNG: "Remember Me", when Doctor Beverly Crusher inquired to Cara Hill about her husband Richard Hill, the confused Cara responded, "I am not married. I've never been married – except perhaps to exobiology."