Cancelled space probes

former media project / scam themed around private spaceflight

cancelled joint NASA/ESA uncrewed space mission

research and engineering project by Breakthrough Initiatives

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

The Nuclear Engine for Rocket Vehicle Application (NERVA; ) was a nuclear thermal rocket engine development program that ran for roughly two decades. Its principal objective was to "establish a technology base for nuclear rocket engine systems to be utilized in the design and development of propulsion systems for space mission application". It was a joint effort of the Atomic Energy Commission (AEC) and the National Aeronautics and Space Administration (NASA), and was managed by the Space Nuclear Propulsion Office (SNPO) until the program ended in January 1973. SNPO was led by NASA's Harold Fi

planned science mission to Mars featuring semi-hard landing strategy

proposed interplanetary space probe

now defunct American nonprofit organization

Cancelled Mars lander mission

cancelled NASA Mars rover concept

proposed set of robotic sensing stations on the Moon

proposed European Space Agency space probe to Venus

mission proposed to NASA and known as CHopper

cancelled space probe proposed by the Japanese Aerospace Exploration Agency

proposed Spanish space probe to Ligeia Mare, the second largest lake on Titan

In 2007–2009, CNES (French Space Agency) and ESA (European Space Agency) had planned to send a remote sensing orbiter and four small Netlanders to Mars. They planned to land them in four locations. The CNES and ESA cancelled this mission because it was too expensive; both agencies planned to send other orbiters and landers for missions like ExoMars.

proposed German Moon mission

proposed robotic semi-buoyant flying wing aircraft to study Venus's atmosphere

proposed space mission to collect material from an asteroid

AVIATR (Aerial Vehicle for In situ and Airborne Titan Reconnaissance) was a proposed airplane mission concept to Titan, a moon of Saturn. The concept was developed in 2011 by a team of scientists led by Jason W. Barnes at the University of Idaho. Compared to Earth, Titan has about one-seventh the gravity but four times the atmospheric density. These conditions make it easier to fly there.