Cancelled astrobiology space missions

proposed project by NASA to construct a system of space telescopes for detecting extrasolar terrestrial planets; postponed several times and finally cancelled in 2011

modified SpaceX Dragon spacecraft design for a proposed sample return mission to Mars

proposed and subsequently cancelled (unfunded) robotic rover to be sent to planet Mars

proposed spacecraft concept by NASA for a lander for Jupiter's moon Europa

proposed Mars sample return mission

Laplace-P (, formerly called Europa Lander) was a proposed orbiter and lander by the Russian Federal Space Agency designed to study the Jovian moon system and explore Ganymede with a lander.

Cancelled Mars lander mission

cancelled NASA Mars rover concept

cancelled Canadian Mars lander and rover mission

Martian astrobiology mission proposal

The 'ExoMars Kazachok (; formerly ExoMars 2020 Surface Platform') was a planned robotic Mars lander led by Roscosmos, part of the ExoMars 2022 joint mission with the European Space Agency. Kazachok translates as "Little Cossack", and is also the name of an East Slavic folk dance.