This is a list of proposed space probes that are planned to focus on the exploration of the Solar System, ordered by date of spacecraft launch. Launched probes are in the List of Solar System probes and the List of active Solar System probes.
Mission name | Launch date | Description | Ref(s) |
---|---|---|---|
![]() | February 2025 | Lunar lander | [1] |
![]() | February 2025 | First commercial asteroid fly-by mission by AstroForge, rideshare of the IM-2 mission. The target is 2022 OB5. | [2] [3] |
![]() | February 2025 | Lunar orbiter, a secondary payload on the IM-2 mission | [4] |
![]() | Spring 2025 | Two Mars orbiters | [5] |
![]() | May 2025 | Asteroid 469219 Kamoʻoalewa sample return, comet 311P/PanSTARRS orbiter | [6] |
![]() | April 2026 | 4-person lunar flyby | [7] [8] |
![]() ![]() ![]() | 2026 | Martian moon sample return mission | [9] |
![]() | 2026 | Lunar south pole lander, rover and flying probe | [10] |
![]() ![]() | 2026-2028 | Lunar lander and rover | [11] |
![]() | 2027 | Lunar sample return mission | [12] |
![]() | Mid 2027 | 4-person lunar flyby, 2-person lunar landing | [7] [13] |
![]() | 2027 | Lunar orbiter | [14] |
![]() | 2028 | Asteroid 3200 Phaethon flyby | [15] |
![]() | July 2028 | Titan rotorcraft lander | [16] [17] |
![]() | 2028 | Mars rover, ExoMars | [18] [19] |
![]() | 2028 | Lunar lander | [14] |
![]() | 2028 | Mars sample return mission | [20] |
![]() | 2028 | Flyby mission to seven asteroids | [21] |
![]() | 2028 | Venus orbiter | [22] |
![]() | September 2029 | Jupiter and Callisto orbiter, Uranus flyby | [23] [24] |
![]() ![]() | 2029 | Flyby of an Oort Cloud comet | [25] [26] [27] |
![]() | 2029 | Venus orbiter | [28] |
![]() | 2031 | Venus orbiter | [29] |
![]() | 2031 | Mars orbiter and lander | [30] [31] |
![]() | 2032 | Venus orbiter and atmospheric probe | [32] |
Mission name | Preliminary launch date estimate | Description | Ref(s) | ||
---|---|---|---|---|---|
Estimated launch date | Estimate by | Estimate as of | |||
![]() | 2024[ needs update ] | Scientia Sinica Informationis | 2019 | "Voyager-like" mission to outer planets | [33] [34] |
![]() | 2025 | Ramon.Space | 2022 | Lunar lander | [35] |
![]() ![]() | January 2025[ needs update ] | MIT/Rocket Lab | 2023 | Private Venus atmospheric probe by Rocket Lab | [36] |
![]() ![]() | 2027[ needs update ] | ESA | 2023 | Mars sample return mission | [37] |
![]() | 2028 | ESA | 2024 | Asteroid orbiter | [38] [39] |
![]() | 2020s[ citation needed ] | Mars orbiter and lander | [40] [41] | ||
![]() | 2031 | Russian Space Research Institute | 2023 | Venus orbiter and lander | [42] |
![]() | 2030 | Roscosmos | 2024 | Lunar sample return mission | [43] |
![]() | NET 2031 | NASA | 2023 | Uranus orbiter and probe | [44] [45] |
![]() | 2036 | NASA | 2022 | "Voyager on steroids" | [46] |
![]() | 2038 | NASA | 2023 | Enceladus orbiter/lander | [47] |
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) |
---|---|---|---|---|
![]() | 2024 | Lunar rover | "NASA stated cost increases, delays to the launch date, and the risks of future cost growth as the reasons to stand down on the mission." NASA announced they would consider "expressions of interest" from industry to use the "VIPER rover system at no cost to the government". In October 2024, VIPER passed all pre-launch tests. | [48] [49] |
![]() | 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. | [50] |
![]() | 2022 | Mars lander | Originally part of the joint ExoMars mission with ESA, planned to deliver Rosalind Franklin rover. Mission was cancelled because of the Russian invasion of Ukraine in 2022. Spacecraft was returned to Roscosmos; officials stated that they will launch it without the rover, but no date was given. | [51] |
Space exploration is the use of astronomy and space technology to explore outer space. While the exploration of space is currently carried out mainly by astronomers with telescopes, its physical exploration is conducted both by uncrewed robotic space probes and human spaceflight. Space exploration, like its classical form astronomy, is one of the main sources for space science.
A gravity assist, gravity assist maneuver, swing-by, or generally a gravitational slingshot in orbital mechanics, is a type of spaceflight flyby which makes use of the relative movement and gravity of a planet or other astronomical object to alter the path and speed of a spacecraft, typically to save propellant and reduce expense.
The Discovery Program is a series of Solar System exploration missions funded by the U.S. National Aeronautics and Space Administration (NASA) through its Planetary Missions Program Office. The cost of each mission is capped at a lower level than missions from NASA's New Frontiers or Flagship Programs. As a result, Discovery missions tend to be more focused on a specific scientific goal rather than serving a general purpose.
The New Frontiers program is a series of space exploration missions being conducted by NASA with the purpose of furthering the understanding of the Solar System. The program selects medium-class missions which can provide high science returns.
The following outline is provided as an overview of and topical guide to space exploration.
The exploration of Uranus has, to date, been through telescopes and a lone probe by NASA's Voyager 2 spacecraft, which made its closest approach to Uranus on January 24, 1986. Voyager 2 discovered 10 moons, studied the planet's cold atmosphere, and examined its ring system, discovering two new rings. It also imaged Uranus' five large moons, revealing that their surfaces are covered with impact craters and canyons.
The exploration of Saturn has been solely performed by crewless probes. Three missions were flybys, which formed an extended foundation of knowledge about the system. The Cassini–Huygens spacecraft, launched in 1997, was in orbit from 2004 to 2017.
Discovery and exploration of the Solar System is observation, visitation, and increase in knowledge and understanding of Earth's "cosmic neighborhood". This includes the Sun, Earth and the Moon, the major planets Mercury, Venus, Mars, Jupiter, Saturn, Uranus, and Neptune, their satellites, as well as smaller bodies including comets, asteroids, and dust.
The Uranus Orbiter and Probe is an orbiter mission concept to study Uranus and its moons. The orbiter would also deploy an atmospheric probe to characterize Uranus's atmosphere. The concept is being developed as a potential large strategic science mission for NASA. The science phase would last 4.5 years and include multiple flybys of each of the major moons.
The following outline is provided as an overview of and topical guide to the Solar System:
The Planetary Missions Program Office is a division of NASA headquartered at the Marshall Space Flight Center, formed by the agency's Science Mission Directorate (SMD). Succeeding the Discovery and New Frontiers Program Office, it was established in 2014 to manage the Discovery and New Frontiers programs of low and medium-cost missions by third-party institutions, and the Solar System Exploration program of NASA-led missions that focus on prioritized planetary science objectives. The Discovery and New Frontiers programs were established in 1992 and 2001 respectively, and have launched fourteen primary missions together, along with two missions launched under the administration of the Planetary Missions Program Office. The Solar System Exploration Program was established alongside the office, with three missions planned for launch under the new program.
Tianwen-4, formerly known as Gan De, is a planned Chinese interplanetary mission to study the Jovian system, possibly sharing a launch with a spacecraft which will make a flyby of Uranus.
The Planetary Exploration of China, also known as Tianwen, is the robotic interplanetary spaceflight program conducted by the China National Space Administration (CNSA). The program aims to explore planets of the Solar System, starting from Mars, and will be expanded to Jupiter and more in the future.
The current schedule has a launch date in JFY 2026, followed by Martian orbit insertion in JFY 2027 and the spacecraft will return to Earth in JFY 2031.
The launch date for Dragonfly, the fourth mission in the New Frontiers Program, has been delayed to June 2027.