general/cancelled-spacecraft

Cancelled NASA spaceflight mission in the Mars Exploration Program

Cancelled NASA spaceflight mission in the Mars Exploration Program

Proposed European student mission to the Moon

Proposed European student mission to the Moon

Unlaunched uncrewed space mission

Proposed European student mission to the Moon

Cancelled NASA component of the International Space Station; living quarters

Proposed European student mission to the Moon

Proposed spacecraft

Cancelled NASA spaceflight mission in the Mars Exploration Program

Canceled NASA orbiter mission to Jupiter's icy moons

Cancelled NASA spaceflight mission in the Mars Exploration Program

Proposed European student mission to the Moon

Cancelled NASA spaceflight mission in the Mars Exploration Program

Proposed NASA mission concept to explore Comet 46P/Wirtanen