In 1998, NASA established its virtual Astrobiology Institute (NAI) to develop the field and provide a scientific framework for flight missions. Astrobiology encompasses the search for habitable environments in “our Solar System and on planets around other stars; the search for evidence of prebiotic chemistry or life on Solar System bodies such as Mars, Jupiter’s moon Europa, and Saturn’s moon Titan; and research into the origin, early evolution, and diversity of life on Earth,” according to NASA.
European countries have also combined scientific and financial resources to form the 18-nation European Space Agency (ESA), which has some collaborative initiatives with NASA focused on astrobiology. For example, in 2016, they expect to launch the NASA/ESA ExoMars/Trace Gas Orbiter (EMTGO) mission, part of the ExoMars Rover Project.
The primary objective is to characterize the chemical composition of the Martian atmosphere, particularly trace species that may be signatures of extant biological and/or geological processes and its variability in space and time. These measurements, along with a good understanding of the contemporaneous atmospheric state, may allow localization of the surface source(s) of “exotic” trace gases.
But how on Mars can scientists detect and analyze life with equipment designed for earth-like conditions? Many collaborative efforts are aimed at developing the specialized equipment required to detect and analyze extraterrestrial samples for signs of life. These will involve developing relatively cheap, compact, rugged instruments that can survive and function in unearth-like environments.