List of proposed Solar System probes

There are currently various proposed space probes to focus on the exploration of the Solar System. For planned missions to the Moon see the dedicated list of missions to the Moon, with its section future missions. Launched probes are in the List of Solar System probes and the List of active Solar System probes.

Mission name	Launch date	Target	Description	Ref(s)
Martian Moons eXploration and Idefix rover	2026	Mars	Phobos sample return mission, Phobos rover, Deimos flyby	[1]
Venus Life Finder	NET summer 2026	Venus	Atmospheric probe by Rocket Lab and MIT	[2]
M-Argo	2027	Asteroid	Cubesat mission to a near-Earth asteroid	[3]
DESTINY+	2028	Asteroid	Asteroid 3200 Phaethon flyby	[4]
Dragonfly	July 2028	Saturn / Titan	Titan rotorcraft lander	[5]
Rosalind Franklin	2028	Mars	Mars rover, ExoMars	[6][7]
Tianwen-3	2028	Mars	Mars sample return mission	[8]
MBR Explorer	2028	Asteroid	Flyby mission to seven asteroids	[9]
Ramses	2028	Asteroid	Orbiter	[10][11]
Venus Orbiter Mission	2028	Venus	Orbiter	[12]
Tianwen-4	September 2029	Jupiter, Uranus	Jupiter and Callisto orbiter, Uranus flyby	[13][14]
Comet Interceptor	2029	Comet	Flyby of an Oort Cloud comet	[15][16]
VERITAS	2029	Venus	Orbiter	[17]
EnVision	2031	Venus	Orbiter	[18]
Mangalyaan-2	2031	Mars	Orbiter and lander	[19][20]
DAVINCI	2032	Venus	Orbiter and atmospheric probe	[21]

Mission name	Preliminary launch date estimate			Target	Description	Ref(s)
	Estimated launch date	Estimate by	Estimate as of
Shensuo (Interstellar Express)	In 2019, the mission was planned to be launched in 2024. There are no updates after 2019.			Outer planets	"Voyager-like" mission to outer planets	[22][23]
Asteroid deflection mission	2027	CNSA	2025	Asteroid	Asteroid deflection mission; one possible target is 2015 XF261	[24][25]
Solar Polar Orbit Observatory	2029	National Space Science Center	2025	Sun	High-inclination solar orbiter, Jupiter flyby	[26]
Mars Telecommunications Orbiter	The MTO mission was revived by the One Big Beautiful Bill Act by U.S. President Donald Trump, that allocated $700 million for the development of a new MTO.			Mars	Orbiter	[27]
Tera-hertz Explorer	Originally planned to be launched in "2020s". There are no updates after 2021.			Mars	Orbiter and lander	[28][29]
Uranus Orbiter and Probe	NET 2031	NASA	2023	Uranus	Orbiter and probe	[30][31]
Venus atmospheric sample return	2033	DSEL/CNSA	2025	Venus	Return atmospheric samples from Venus	[32]
Interstellar Probe	2036	NASA	2022	Outer planets	"Voyager on steroids"	[33]
Venera-D	2036	Russian Academy of Sciences	2025	Venus	Orbiter and lander	[34]
Enceladus Orbilander	2038	NASA	2023	Saturn / Enceladus	Enceladus orbiter/lander	[35]
Mars Research Station for ISRU	2038	DSEL/CNSA	2025	Mars	Mars surface research station for In-Situ Resource Utilization (ISRU)	[32]
Probe to Neptune and Triton	2039	DSEL/CNSA	2025	Neptune / Triton	Exploration of Neptune and its moon Triton	[32]
L4 (Probe to Enceladus)	2042	ESA	2024	Saturn / Enceladus	Enceladus lander	[36][37]

The following missions were suspended or cancelled because of political, budgetary, or other reasons. The spacecraft were already assembled at the time of suspension/cancellation, so these missions can be resumed.

Mission name	Cancellation date	Description	Status and reason	Ref(s)
Janus	2023	Dual asteroids probe	Was expected to be a secondary payload on the Psyche launch. After the delay, it was assessed that Janus wouldn't be able to reach the required trajectory. Both spacecraft were placed into long-term storage.	[38]

• Timeline of Solar System exploration
• Planned space telescopes
• Proposed space telescopes
• Planned heliophysics missions
• Planned Earth observation satellites
• Planned Moon missions
• Planned Venus missions
• Planned Mars missions
• Planned outer planets missions
• Future visits of minor planets and comets
• Future and proposed missions to be placed at Lagrange points