# Timeline of Solar System exploration

This is a timeline of Solar System exploration ordering events in the exploration of the Solar System by date of spacecraft launch. It includes:
* All spacecraft that have left Earth orbit for the purposes of Solar System exploration (or were launched with that intention but failed), including lunar probes.
* A small number of pioneering or notable Earth-orbiting craft.
It does not include:
* Centuries of terrestrial telescopic observation.
* The great majority of Earth-orbiting satellites.
* Space probes leaving Earth orbit that are not concerned with Solar System exploration (such as space telescopes targeted at distant galaxies, cosmic background radiation observatories, and so on).
* Probes that failed at launch.
The dates listed are launch dates, but the achievements noted may have occurred some time later—in some cases, a considerable time later (for example, Voyager 2, launched 20 August 1977, did not reach Neptune until 1989).

## 1950s

| Mission name | Launch date | Description |
| Sputnik 1 | 4 October 1957 | First Earth orbiter |
| Sputnik 2 | 3 November 1957 | Earth orbiter, first animal in orbit, a dog named Laika |
| Explorer 1 | 1 February 1958 | Earth orbiter; discovered Van Allen radiation belts |
| Vanguard 1 | 17 March 1958 | Earth orbiter; oldest spacecraft still in Earth orbit |
| Luna 1 | 2 January 1959 | First lunar flyby (attempted lunar impact?); first artificial satellite in heliocentric orbit. |
| Pioneer 4 | 3 March 1959 | Lunar flyby |
| Luna 2 | 12 September 1959 | First extraterrestrial impact and lunar impact, First artificial object on Moon |
| Luna 3 | 4 October 1959 | Lunar flyby; First images of another celestial body taken from space, most notably, the far side of Moon |

## 1960s

| Mission name | Launch date | Description |
| Pioneer 5 | 11 March 1960 | Interplanetary space investigations |
| Venera 1 | 12 February 1961 | First probe to another planet; Venus flyby (contact lost before flyby) |
| Vostok 1 | 12 April 1961 | First crewed Earth orbiter (Yuri Gagarin) |
| Ranger 1 | 23 August 1961 | Attempted lunar test flight (failed to leave Earth orbit) |
| Ranger 2 | 18 November 1961 | Attempted lunar test flight (failed to leave Earth orbit) |
| Ranger 3 | 26 January 1962 | Attempted lunar impact (missed Moon) |
| Ranger 4 | 23 April 1962 | Lunar impact (but unintentionally became the first spacecraft to hit the lunar farside and returned no data) |
| Mariner 2 | 27 August 1962 | First successful planetary encounter, First successful Venus flyby |
| Ranger 5 | 18 October 1962 | Attempted lunar impact (missed Moon) |
| Mars 1 | 1 November 1962 | First probe to Mars: flyby (contact lost) |
| Luna 4 | 2 April 1963 | Attempted lunar lander (missed Moon) |
| Cosmos 21 | 11 November 1963 | Attempted Venera test flight? |
| Ranger 6 | 30 January 1964 | Lunar impact (cameras failed) |
| Zond 1 | 2 April 1964 | Venus flyby (contact lost) |
| Ranger 7 | 28 July 1964 | Lunar impact (success) |
| Voskhod 1 | 12 October 1964 | First orbiter with multimember crew |
| Mariner 3 | 5 November 1964 | Attempted Mars flyby (failed to attain correct trajectory) |
| Mariner 4 | 28 November 1964 | First successful Mars flyby |
| Zond 2 | 30 November 1964 | Mars flyby (contact lost) |
| Ranger 8 | 17 February 1965 | Lunar impact |
| Voskhod 2 | 18 March 1965 | First space walk, by Alexei Leonov |
| Ranger 9 | 21 March 1965 | Lunar impact |
| Lincoln Calibration Sphere 1 | 6 May 1965 | Oldest spacecraft still in use |
| Luna 5 | 9 May 1965 | Lunar impact (attempted soft landing) |
| Luna 6 | 8 June 1965 | Attempted lunar lander (missed Moon) |
| Zond 3 | 18 July 1965 | Lunar flyby |
| Luna 7 | 4 October 1965 | Lunar impact (attempted soft landing) |
| Venera 2 | 12 November 1965 | Venus flyby (contact lost) |
| Venera 3 | 16 November 1965 | Venus lander (contact lost) – First spacecraft to reach another planet's atmosphere and surface, First Venus impact |
| Luna 8 | 3 December 1965 | Lunar impact (attempted soft landing?) |
| Pioneer 6 | 16 December 1965 | "Space weather" observations |
| Luna 9 | 31 January 1966 | First extraterrestrial lander and lunar lander |
| Luna 10 | 31 March 1966 | First extraterrestrial orbiter (except heliocentric) and first lunar orbiter |
| Surveyor 1 | 30 May 1966 | Lunar lander |
| Explorer 33 | 1 July 1966 | Attempted lunar orbiter (failed to attain lunar orbit) |
| Lunar Orbiter 1 | 10 August 1966 | Lunar orbiter |
| Pioneer 7 | 17 August 1966 | "Space weather" observations |
| Luna 11 | 24 August 1966 | Lunar orbiter |
| Surveyor 2 | 20 September 1966 | Attempted lunar lander (crashed into Moon) |
| Luna 12 | 22 October 1966 | Lunar orbiter |
| Lunar Orbiter 2 | 6 November 1966 | Lunar orbiter |
| Luna 13 | 21 December 1966 | Lunar lander |
| Lunar Orbiter 3 | 5 February 1967 | Lunar orbiter |
| Surveyor 3 | 17 April 1967 | Lunar lander |
| Lunar Orbiter 4 | 4 May 1967 | Lunar orbiter |
| Venera 4 | 12 June 1967 | First functioning extraterrestrial atmospheric probe (Venus) |
| Mariner 5 | 14 June 1967 | Venus flyby |
| Surveyor 4 | 14 July 1967 | Attempted lunar lander (crashed into Moon) |
| Explorer 35 (IMP-E) | 19 July 1967 | Lunar orbiter |
| Lunar Orbiter 5 | 1 August 1967 | Lunar orbiter |
| Surveyor 5 | 8 September 1967 | Lunar lander |
| Surveyor 6 | 7 November 1967 | Lunar lander, first lift-off from an extraterrestrial body |
| Apollo 4 | 9 November 1967 | Lunar programme test flight in Earth orbit (uncrewed) |
| Pioneer 8 | 13 December 1967 | "Space weather" observations |
| Surveyor 7 | 7 January 1968 | Lunar lander |
| Apollo 5 | 22 January 1968 | Lunar programme test flight in Earth orbit (uncrewed) |
| Zond 4 | 2 March 1968 | Lunar programme test flight out of Earth orbit (uncrewed) |
| Luna 14 | 7 April 1968 | Lunar orbiter |
| Zond 5 | 14 September 1968 | First lunar flyby and return to Earth, first life forms to circle the Moon |
| Apollo 7 | 11 October 1968 | Lunar programme test flight in Earth orbit (crewed) |
| Pioneer 9 | 8 November 1968 | "Space weather" observations |
| Zond 6 | 10 November 1968 | Lunar flyby and return to Earth |
| Apollo 8 | 21 December 1968 | First crewed spacecraft to leave Earth orbit, first crewed lunar orbiter |
| Venera 5 | 5 January 1969 | Venus atmospheric probe |
| Venera 6 | 10 January 1969 | Venus atmospheric probe |
| Mariner 6 | 25 February 1969 | Mars flyby |
| Apollo 9 | 3 March 1969 | Crewed lunar lander (LEM) flight test in Earth orbit |
| Mariner 7 | 27 March 1969 | Mars flyby |
| Apollo 10 | 18 May 1969 | Crewed lunar orbiter |
| Luna 15 | 13 July 1969 | Second attempted lunar sample return |
| Apollo 11 | 16 July 1969 | First crewed lunar landing and first successful sample return mission |
| Zond 7 | 7 August 1969 | Lunar flyby and return to Earth |
| Apollo 12 | 14 November 1969 | Crewed lunar landing |

## 1970s

| Mission name | Launch date | Description |
| Apollo 13 | 11 April 1970 | Crewed lunar flyby and return to Earth (crewed lunar landing aborted). Farthest from Earth a human has gone (401,056 km) |
| Venera 7 | 17 August 1970 | First Venus lander and the first spacecraft to "soft" land on another planet (with some data returned from the surface) |
| Luna 16 | 12 September 1970 | First robotic lunar sample return |
| Zond 8 | 20 October 1970 | Lunar flyby and return to Earth |
| Luna 17/Lunokhod 1 | 10 November 1970 | First remote controlled rover |
| Apollo 14 | 31 January 1971 | Crewed lunar landing |
| Salyut 1 | 19 April 1971 | First space station |
| Mars 2 | 19 May 1971 | First Mars impact, Mars orbiter and attempted lander; First rover (Prop-M) sent to another planet (Mars) |
| Mars 3 | 28 May 1971 | Mars orbiter, First Mars lander (first image taken from the surface of another planet, though the received image did not show anything); First rover (Prop-M) to be landed but not deployed on another planet (Mars) |
| Mariner 9 | 30 May 1971 | First to orbit another planet (Mars) |
| Apollo 15 | 26 July 1971 | Crewed lunar landing; First crewed lunar rover |
| Luna 18 | 2 September 1971 | Attempted lunar sample return (crashed into Moon) |
| Luna 19 | 28 September 1971 | Lunar orbiter |
| Luna 20 | 14 February 1972 | Lunar robotic sample return |
| Pioneer 10 | 3 March 1972 | First Jupiter flyby |
| Venera 8 | 27 March 1972 | Venus lander |
| Apollo 16 | 16 April 1972 | Crewed lunar landing |
| Apollo 17 | 7 December 1972 | Last crewed lunar landing |
| Luna 21/Lunokhod 2 | 8 January 1973 | Lunar rover |
| Pioneer 11 | 5 April 1973 | Jupiter flyby and First Saturn flyby |
| Explorer 49 (RAE-B) | 10 June 1973 | Lunar orbiter/radio astronomy |
| Mars 4 | 21 July 1973 | Mars flyby (attempted Mars orbiter) |
| Mars 5 | 25 July 1973 | Mars orbiter |
| Mars 6 | 5 August 1973 | Mars flyby and attempted lander (failed due to damage on Mars landing) |
| Mars 7 | 9 August 1973 | Mars flyby and attempted lander (missed Mars) |
| Mariner 10 | 3 November 1973 | Lunar and Venus flybys in addition to the First Mercury flyby |
| Luna 22 | 29 May 1974 | Lunar orbiter |
| Luna 23 | 28 October 1974 | Attempted lunar sample return (failed due to damage on lunar landing) |
| Helios-A | 10 December 1974 | Solar observations |
| Venera 9 | 8 June 1975 | First Venus orbiter and lander; First successful images from the surface of another planet (Venus) |
| Venera 10 | 14 June 1975 | Venus orbiter and lander |
| Viking 1 | 20 August 1975 | Mars orbiter and lander; First clear pictures from Martian surface |
| Viking 2 | 9 September 1975 | Mars orbiter and lander |
| Helios-B | 15 January 1976 | Solar observations |
| Luna 24 | 9 August 1976 | Lunar robotic sample return |
| Voyager 2 | 20 August 1977 | Jupiter/Saturn/first Uranus/first Neptune flyby |
| Voyager 1 | 5 September 1977 | Jupiter/Saturn flyby, first to exit the heliosphere |
| Pioneer Venus 1 | 20 May 1978 | Venus orbiter |
| Pioneer Venus 2 | 8 August 1978 | Venus atmospheric probes |
| ISEE-3 | 12 August 1978 | Solar wind investigations; later redesignated International Cometary Explorer and performed Comet Giacobini-Zinner and Comet Halley flybys – First comet flyby |
| Venera 11 | 9 September 1978 | Venus flyby and lander |
| Venera 12 | 14 September 1978 | Venus flyby and lander |

## 1980s

| Mission name | Launch date | Description |
| Venera 13 | 30 October 1981 | Venus flyby and lander. First recording of sound on another planet. |
| Venera 14 | 4 November 1981 | Venus flyby and lander |
| Venera 15 | 2 June 1983 | Venus orbiter |
| Venera 16 | 7 June 1983 | Venus orbiter |
| Vega 1 | 15 December 1984 | Venus flyby, lander and first extraterrestrial aircraft (aerostat balloon); continued on to Comet Halley flyby |
| Vega 2 | 21 December 1984 | Venus flyby, lander and balloon; continued on to Comet Halley flyby |
| Sakigake | 8 January 1985 | Comet Halley flyby |
| Giotto | 2 July 1985 | First close observation of comet (distance 596 kilometers), Comet Halley flyby |
| Suisei (Planet-A) | 18 August 1985 | Comet Halley flyby |
| Mir | 19 February 1986 | First modular space station (operational 1986–2000; final module added 1996) |
| Phobos 1 | 7 July 1988 | Attempted Mars orbiter/Phobos landers (contact lost) |
| Phobos 2 | 12 July 1988 | Mars orbiter/attempted Phobos landers (contact lost) |
| Magellan | 4 May 1989 | Venus orbiter |
| Galileo | 18 October 1989 | Venus flyby, first Asteroid flyby (Gaspra), first Asteroid moon discovery (Dactyl), first Jupiter orbiter, first Jupiter atmospheric probe |

## 1990s

| Mission name | Launch date | Description |
| Hiten (MUSES-A) | 24 January 1990 | Lunar flyby and orbiter |
| Hubble Space Telescope | 24 April 1990 | Orbital space telescope (operational since 1990) |
| Ulysses | 6 October 1990 | Solar polar orbiter |
| Yohkoh (Solar-A) | 30 August 1991 | Solar observations (1991–2001) |
| Mars Observer | 25 September 1992 | Attempted Mars orbiter (contact lost) |
| Clementine | 25 January 1994 | Lunar orbiter/attempted asteroid flyby (contact lost) |
| WIND | 1 November 1994 | Solar wind observations |
| SOHO | 2 December 1995 | Solar observatory (operational since 1996) |
| NEAR Shoemaker | 17 February 1996 | Eros orbiter, first near-Earth asteroid flyby, first asteroid orbit and first asteroid landing |
| Mars Global Surveyor | 7 November 1996 | Mars orbiter |
| Mars 96 | 16 November 1996 | Attempted Mars orbiter/landers (failed to escape Earth orbit) |
| Mars Pathfinder | 4 December 1996 | Mars lander and first successful planetary rover |
| ACE | 25 August 1997 | Solar wind and "space weather" observations (operational since 1998) |
| Cassini–Huygens | 15 October 1997 | First Saturn orbiter and first outer planet moon lander (on Titan) |
| Lunar Prospector | 7 January 1998 | Lunar orbiter |
| Nozomi (Planet-B) | 3 July 1998 | Attempted Mars orbiter (failed to enter Mars orbit) |
| Deep Space 1 (DS1) | 24 October 1998 | Asteroid and comet flyby |
| ISS | 20 November 1998 | International space station |
| Mars Climate Orbiter | 11 December 1998 | Attempted Mars orbiter (orbit insertion failed; entered atmosphere and was destroyed) |
| Mars Polar Lander/Deep Space 2 (DS2) | 3 January 1999 | Attempted Mars lander/penetrators (contact lost) |
| Stardust | 7 February 1999 | First comet coma sample return (returned 15 January 2006) |

## 2000s

| Mission name | Launch date | Description |
| 2001 Mars Odyssey | 7 April 2001 | Mars orbiter |
| Genesis | 8 August 2001 | First solar wind sample return |
| CONTOUR | 3 July 2002 | Attempted flyby of comet nuclei (Encke, Schwassmann-Wachmann-3, and optionally a third one; lost in space) |
| Hayabusa (MUSES-C) | 9 May 2003 | Asteroid lander and first sample return from asteroid |
| Mars Express/Beagle 2 | 2 June 2003 | Mars orbiter/attempted lander (lander failure) |
| Mars Exploration Rover Spirit | 10 June 2003 | Mars rover |
| Mars Exploration Rover Opportunity | 8 July 2003 | Mars rover |
| SMART-1 | 27 September 2003 | Lunar orbiter |
| Rosetta/Philae | 2 March 2004 | Asteroid Šteins and Lutetia flybys; first comet orbiter and lander (Landed in November 2014) |
| MESSENGER | 3 August 2004 | First Mercury orbiter (Achieved orbit 18 March 2011) |
| Deep Impact | 12 January 2005 | Comet flyby and impact |
| Mars Reconnaissance Orbiter | 12 August 2005 | Mars orbiter |
| Venus Express | 9 November 2005 | Venus polar orbiter |
| New Horizons | 19 January 2006 | First Pluto/Charon flyby (on 14 July 2015); continued on to 486958 Arrokoth flyby (on 1 January 2019) |
| Hinode (Solar-B) | 22 September 2006 | Solar orbiter |
| STEREO | 26 October 2006 | Two spacecraft, solar orbiters |
| Phoenix | 4 August 2007 | Mars polar lander (Mars landing on 25 May 2008) |
| SELENE (Kaguya) | 14 September 2007 | Lunar orbiters |
| Dawn | 27 September 2007 | Asteroid Ceres and Vesta orbiter (Entered orbit around Vesta on 16 July 2011 and around Ceres on 6 March 2015) |
| Chang'e 1 | 24 October 2007 | Lunar orbiter |
| Chandrayaan-1 | 22 October 2008 | Lunar orbiter and impactor; discovered water on the Moon |
| Herschel Space Observatory | 14 May 2009 | Infrared space telescope at Sun–Earth L$_2$ Lagrange point |
| Lunar Reconnaissance Orbiter/LCROSS | 18 June 2009 | Lunar polar orbiter and lunar impactor |
| WISE (NEOWISE) | 14 December 2009 | Infrared survey of celestial sky (WISE mission); later Near-Earth object survey (NEOWISE mission) |

## 2010s

| Mission name | Launch date | Description |
| Solar Dynamics Observatory | 11 February 2010 | Continuous solar monitoring |
| Akatsuki (Planet-C) | 20 May 2010 | Venus orbiter (orbit insertion failed in 2010 / successful orbit insertion on 7 December 2015) |
| PICARD | 15 June 2010 | Solar monitoring |
| Chang'e 2 | 1 October 2010 | Lunar orbiter, asteroid 4179 Toutatis flyby |
| Juno | 5 August 2011 | Jupiter orbiter |
| GRAIL | 10 September 2011 | Two spacecraft, Lunar orbiters |
| Fobos-Grunt and Yinghuo-1 | 8 November 2011 | Attempted Phobos sample return and Mars orbiter, respectively; both failed to escape Earth orbit |
| Mars Science Laboratory (Curiosity rover) | 26 November 2011 | Mars rover (landed 6 August 2012) |
| Van Allen Probes (RBSP) | 30 August 2012 | Earth Van Allen radiation belts study |
| IRIS | 28 June 2013 | Solar observations |
| LADEE | 7 September 2013 | Lunar orbiter |
| Hisaki | 14 September 2013 | Planetary atmosphere observatory |
| Mars Orbiter Mission (Mangalyaan) | 5 November 2013 | Mars orbiter |
| MAVEN | 18 November 2013 | Mars orbiter |
| Chang'e 3 | 1 December 2013 | Lunar lander and rover (first lander since Soviet Luna 24 in 1976) |
| Chang'e 5-T1 | 23 October 2014 | Circumlunar mission and Earth reentry; technology demonstration to prepare for Chang'e 5 mission |
| Hayabusa2 / MASCOT | 3 December 2014 | Asteroid lander and sample return (sample returned 5 December 2020), first asteroid rover |
| PROCYON | 3 December 2014 | Comet observer and attempted asteroid flyby (engine failure) |
| DSCOVR | 11 February 2015 | Solar observation |
| ExoMars Trace Gas Orbiter and EDM lander | 14 March 2016 | Mars orbiter and attempted lander (lander failure) |
| OSIRIS-REx | 8 September 2016 | Asteroid sample return mission (sample returned 24 September 2023) |
| InSight | 5 May 2018 | Mars lander |
| Queqiao | 20 May 2018 | Relay satellite for Chang'e 4 in Halo orbit around Earth–Moon L$_2$ Lagrange point |
| Parker Solar Probe | 12 August 2018 | Solar corona probe, closest solar approach (0.04 AU) |
| BepiColombo | 19 October 2018 | Two Mercury orbiters (orbit insertion planned in December 2025) |
| Chang'e 4 | 7 December 2018 | Lunar lander and rover, first landing on the lunar far side |
| Beresheet | 22 February 2019 | Attempted lunar lander (crashed into Moon) |
| Chandrayaan-2 | 22 July 2019 | Lunar orbiter; attempted lander and rover (contact lost during final stage of descent) |

## 2020s

| Mission name | Launch date | Description |
| Solar Orbiter | 10 February 2020 | Sun-observing satellite |
| Mars Hope | 19 July 2020 | Mars orbiter |
| Tianwen-1 (Zhurong rover) | 23 July 2020 | Mars orbiter, lander, and rover |
| Mars 2020 (Perseverance rover and Ingenuity helicopter) | 30 July 2020 | Mars rover and helicopter drone; first powered flight on another planet |
| Chang'e 5 | 23 November 2020 | Lunar sample return |
| Lucy | 16 October 2021 | Flyby of six Jupiter trojans and two main belt asteroids |
| DART / LICIACube | 24 November 2021 | Asteroid 65803 Didymos flyby, asteroid moon Dimorphos impactor |
| James Webb Space Telescope | 25 December 2021 | Infrared space telescope at Sun–Earth L$_2$ |
| CAPSTONE | 28 June 2022 | Lunar orbiter |
| Danuri (KPLO) | 5 August 2022 | Lunar orbiter |
| Artemis 1 and 10 cubesats | 16 November 2022 | Uncrewed lunar orbital test of Orion spacecraft and Space Launch System. The cubesats are launched as rideshares and will execute their own missions. |
| Hakuto-R Mission 1 (Rashid rover) and Lunar Flashlight | 11 December 2022 | Lunar lander technology demonstration, lunar rover, and lunar orbiter launched together (crashed into Moon) |
| JUICE | 14 April 2023 | Jupiter/Ganymede orbiter |
| Chandrayaan-3 | 14 July 2023 | Lunar orbiter, lander and rover; first soft landing near the lunar South Pole |
| Luna 25 | 10 August 2023 | Attempted lunar south pole lander (crashed into Moon) |
| Aditya-L1 | 2 September 2023 | Sun-observing spacecraft at Sun–Earth L$_1$ |
| SLIM (LEV-1, LEV-2) | 6 September 2023 | Lunar flyby, lander and rovers |
| Psyche | 13 October 2023 | Asteroid 16 Psyche orbiter |
| Peregrine Mission One (including Iris and Colmena rovers) | 8 January 2024 | Lunar lander and rovers (landing precluded) |
| IM-1 Nova-C Odysseus (including EagleCam deployable camera) | 15 February 2024 | Lunar landers |
| DRO A/B | 13 March 2024 | Lunar orbiters |
| Queqiao-2 (including Tiandu-1 and 2) | 20 March 2024 | Lunar orbiters |
| Chang'e 6 (including Pakistan's ICUBE-Q cubesat) | 3 May 2024 | Lunar sample return, rover and orbiters; first sample return from the lunar far side |
| Hera (3 orbiters) | 7 October 2024 | Asteroid 65803 Didymos rendezvous |
| Europa Clipper | 14 October 2024 | Jupiter orbiter, Europa multiple flyby |
| Blue Ghost M1 | 15 January 2025 | Lunar lander |
| Hakuto-R Mission 2 (including Tenacious rover) | 15 January 2025 | Lunar lander and rover |
| Hakuto-R Mission 2 (including MAPP LV1, Micro-Nova, AstroAnt and Yaoki rover) | 27 February 2025 | Lunar lander and rovers |
| Lunar Trailblazer | 27 February 2025 | Lunar orbiter |
| Brokkr-2 | 27 February 2025 | Asteroid flyby |