ESA - Robotic Exploration of Mars: ExoMars Trace Gas Orbiter (TGO)

Credit:ESA

"The 2016 ExoMars Trace Gas Orbiter is the first in a series of Mars missions to be undertaken jointly by the two space agencies, ESA and NASA. A key goal of this mission is to gain a better understanding of methane and other atmospheric gases that are present in small concentrations (less than 1% of the atmosphere) but nevertheless could be evidence for possible biological or geological activity."

ESA - Robotic Exploration of Mars: ExoMars Trace Gas Orbiter (TGO)