SpaceX Red Dragon

The primary objective of the initial Red Dragon mission was to test techniques and technology to enter the Martian atmosphere with equipment that a human crew could conceivably use.

In April 2016, SpaceX announced that they had signed an unfunded Space Act Agreement with NASA, providing technical support, for a launch no earlier than 2018.

[4] SpaceX worked with NASA's Ames Research Center in 2011 to produce a feasibility study for a mission that would search for evidence of life on Mars (biosignatures), past or present.

[6][7] SpaceX initially planned to propose Red Dragon for funding in 2013 and 2015 as the United States NASA Discovery mission #13 for launch in 2022,[8][6][7] but it was not submitted.

[5] The instruments were proposed to drill approximately 1.0 metre (3.3 ft) under ground to sample reservoirs of water ice known to exist in the shallow subsurface.

[13] In exchange for Martian entry, descent, and landing data from SpaceX, NASA offered technical support and telemetry for the Red Dragon mission.

[19] Musk stated on Twitter that a "vastly bigger ship" would be used to test a different landing method now thought to be better than the concept of heat shield on the bottom and thrusters on the sides.

[1] After direct entry into the atmosphere at 6 km/s (13,000 mph)[21] it was calculated that the capsule's own aerodynamic drag may slow it sufficiently for the remainder of descent to be within the capability of the SuperDraco retro-propulsion thrusters.