List of missions to the outer planets

Short description: none

Montage of planets and some moons that the two Voyager spacecraft have visited and studied. It is the only program that visited all four outer planets.

A total of nine spacecraft have been launched on missions that involve visits to the outer planets; all nine missions involve encounters with Jupiter, with four spacecraft also visiting Saturn. Only one spacecraft, Voyager 2, has visited Uranus and Neptune. The nine missions include two, Ulysses and New Horizons, whose primary objectives were not outer planets, but which flew past Jupiter to gain gravity assists en route to a polar orbit around the Sun (Ulysses), and to Pluto (New Horizons). Pluto was considered a planet at the time that New Horizons launched, but was reclassified as a dwarf planet. Cassini–Huygens also flew past Jupiter for a gravity assist on its mission to explore Saturn.

Only three of the missions to the outer planets have been orbiters: Galileo orbited Jupiter for eight years, while Cassini orbited Saturn for thirteen years. Juno has been orbiting Jupiter since 2016.

## Contents

* 1 Summary
* 2 Jupiter
* 3 Saturn
* 4 Uranus
* 5 Neptune
* 6 Pluto and trans-Neptunian objects
* 7 Statistics
* 7.1 Major milestones
* 8 Future missions
* 9 See also
* 10 References

## Summary

Summary of missions to the outer planets and beyond.

System

Spacecraft

| Jupiter
Jupiter trojans | Saturn | Uranus
Uranus trojans | Neptune
Neptune trojans | Pluto
Trans-Neptunian objects

|
|
|
|
|

Pioneer 10 | 1973 flyby
Jupiter and moons  |  |  |  |
Pioneer 11 | 1974 flyby
Jupiter and moons  | 1979 flyby
Saturn and moons  |  |  |
Voyager 1 | 1979 flyby
Jupiter and moons  | 1980 flyby
Saturn and moons  |  |  |
Voyager 2 | 1979 flyby
Jupiter and moons  | 1981 flyby
Saturn and moons  | 1986 flyby
Uranus and moons  | 1989 flyby
Neptune and moons  |
Ulysses | 1992, 2004 gravity assist
Jupiter  |  |  |  |
Galileo | 1995-2003 orbiter
Jupiter and moons
1995 atmospheric
Jupiter  |  |  |  |
Cassini–Huygens | 2000 gravity assist
Jupiter and moons  | 2004-2017 orbiter
Saturn and moons
2005 lander
Titan  |  |  |
New Horizons | 2007 gravity assist
Jupiter and moons  |  |  |  | 2015 flyby
Pluto and moons
2019 flyby
486958 Arrokoth
Juno | 2016-2026 orbiter
Jupiter  |  |  |  |
Lucy | 2027- flyby mission (launched 2021)
3548 Eurybates
15094 Polymele
11351 Leucus
21900 Orus
617 Patroclus |  |  |  |
Jupiter Icy Moons Explorer | 2031- orbiter mission (launched 2023)
Jupiter and Ganymede  |  |  |  |
Europa Clipper | 2030- orbiter mission (launched 2024)
Europa  |  |  |  |

## Jupiter

Main article: Astronomy:Exploration of Jupiter

Nine spacecraft have been launched to explore Jupiter, with two other spacecraft making gravity-assist flybys.

New Horizons, although eventually targeting Pluto, used Jupiter for a gravity assist and had an extensive almost half year observation campaign of Jupiter and its moons (hence it is counted in the eight).[1]

Gravity assist, destination elsewhere

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator  | Mission Type  | Outcome

|
|
|
|
|
|

1  | Pioneer 10 | Pioneer 10 | 3 March 1972[2] | Atlas SLV-3C Centaur-D[3] |  NASA | Flyby  | Successful[4]
Humanity's first object to attain Solar system's escape velocity. First probe to traverse the asteroid belt, to reach Jovanian system, to use a gravity assist and to leave the proximity of Solar systems' planets. Held the record for fastest human-made object at the time and the most distant one until Voyager 1 overtook in 1998. Closest approach towards Jupiter was at 02:25 UTC on 4 December 1973. Flew by Callisto, Ganymede, Europa and Io at long distances. Final signal received on 23 January 2003, 12 billion km (80 AU; 7.5 billion mi) from Earth.[5]
2  | Pioneer 11 | Pioneer 11 | 6 April 1973[2] | Atlas SLV-3D Centaur-D1A[3] |  NASA | Flyby  | Successful[6]
Closest approach towards Jupiter at 05:22 UTC on 3 December 1974. Flew by Callisto, Ganymede, Io and Europa . First probe to reach Saturnian system. Final contact was roughly at a distance of 6.5 billion km (43 AU; 4.0 billion mi)[7]
3  | Voyager 2 | Voyager 2 | 20 August 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Closest approach at 22:29 on 9 July 1979. Flew past Callisto, Ganymede, Europa, Amalthea and Io at long distances. Later flew past Saturn, Uranus and Neptune. Oldest active space probe at 48 years, 11 months, 27 days. Currently studying interstellar medium. At a distance of 136.1 astronomical unit|AU (20.4 billion km; 12.7 billion mi) from Earth as of May 2024[update][9]
4  | Voyager 1 | Voyager 1 | 5 September 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Closest approach at 12:05 UTC on 5 March 1979. Flew past Amalthea, Europa, Ganymede and Callisto at long distances. Later flew past Saturn. First probe to depart heliosphere and enter interstellar medium. Most distant human-made object at a distance of 162.7 astronomical unit|AU (24.3 billion km; 15.1 billion mi) from Earth as of May 2024[update].[10]
5  | Galileo project | Galileo | 18 October 1989[2] | Space Shuttle Atlantis
STS-34 / IUS[11] |  NASA | Orbiter  | Successful[12]
Atmospheric entry probe | Atmospheric probe  | Successful[12]
First probe to enter Jupiter's atmosphere. Entered at 22:04 UTC on 7 December 1995 and operated for 57 minutes; main spacecraft entered orbit at 00:27 UTC on 8 December.[13] Spacecraft was deorbited on 21 September 2003, impacting Jupiter's atmosphere at 18:57:18 UTC.[14]
–  | Ulysses | Ulysses | 6 October 1990[2] | Space Shuttle Discovery
STS-41 / IUS[15] |  23px NASA/ESA | Flyby  | Successful
Flyby on 8 February 1992 to reach a high-inclination heliocentric orbit.[16] Also made a distant incidental flyby on 4 February 2004[17]
–  | Cassini–Huygens | Cassini | 15 October 1997[2] | Titan IV(401)B Centaur-T[18] |  23px NASA/ESA | Flyby  | Successful
Huygens lander | Successful
Flyby on 30 December 2000 en route to Saturn[19]
6  | New Horizons | New Horizons | 19 January 2006[2] | Atlas V 551[20] |  NASA | Flyby  | Successful
Gravity assist.[20] Major observation campaign from Jan-June.[1] Flyby on 28 February 2007 (closest approach at 05:43:40[21]) en route to Pluto.[22] First probe to flyby Plutonian system.
7  | Juno | Juno | 5 August 2011[2] | Atlas V 551[23] |  NASA | Orbiter  | Operational
Entered orbit 4 July 2016. First outer planet explorer probe with solar panels.[24]
8  | Jupiter Icy Moons Explorer | JUICE | 14 April 2023  | Ariane 5 ECA | 23px ESA | Orbiter  | Enroute
First interplanetary probe to the outer Solar System planets not launched by the United States and the first set to orbit a moon (Ganymede) other than Earth's Moon.
9  | Europa Clipper | Europa Clipper | 14 October 2024  | Falcon Heavy |  NASA | Orbiter  | Enroute
Jupiter orbiter with Europa flybys

## Saturn

Main article: Astronomy:Exploration of Saturn

Four spacecraft have visited Saturn; Pioneer 11, Voyager 1 and Voyager 2 made flybys, while Cassini–Huygens entered orbit, and deployed a probe into the atmosphere of Titan.

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator  | Mission Type  | Outcome

|
|
|
|
|
|

1  | Pioneer 11 | Pioneer 11 | 6 April 1973  | Atlas SLV-3D Centaur-D1A[3] |  NASA | Flyby  | Successful
First probe to reach Saturnian system. Closest approach on 1 September 1979 at 16:31 UTC. Flew past Iapetus, Dione, Mimas, Tethys, Enceladus, Rhea and Titan at long distances. Discovered Epimetheus and Janus.[7]
2  | Voyager 2 | Voyager 2 | 20 August 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Closest approach at 01:21 UTC on 26 August 1981. Flew past Iapetus, Titan, Dione, Mimas, Enceladus, Tethys and Rhea at long distances. Later flew past Uranus and Neptune.[9]
3  | Voyager 1 | Voyager 1 | 5 September 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Closest approach on 12 November 1980 at 23:45 UTC. Flew past Titan, Tethys, Mimas, Enceladus and Rhea.[10][9]
4  | Cassini–Huygens | Cassini | 15 October 1997[2] | Titan IV(401)B Centaur-T[18] |  NASA | Orbiter  | Successful
Huygens | 23px ESA | Titan lander  | Successful
Entered orbit 1 July 2004. First probe to orbit Saturn. Discovered seven new moons. Huygens probe became the first spacecraft to land on Titan with the farthest landing from Earth a spacecraft ever made. It was deployed from Cassini and landed at 10:13 UTC on 14 January 2005. Mission concluded on 15 September 2017.[25]

## Uranus

Main article: Astronomy:Exploration of Uranus

Voyager 2 is the only spacecraft to have visited Uranus, making a single flyby as part of its grand tour of the outer planets.

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator  | Mission Type  | Outcome

|
|
|
|
|
|

1  | Voyager 2 | Voyager 2 | 20 August 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Discovered eleven moons. Flew past Miranda, Ariel, Umbriel, Titania and Oberon. Closest approach at 17:59 UTC on 24 January 1986. Later flew past Neptune.[9]

## Neptune

Main article: Astronomy:Exploration of Neptune

Voyager 2 is the only spacecraft to have visited Neptune, making a single flyby as part of its grand tour of the outer planets.

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator  | Mission Type  | Outcome

|
|
|
|
|
|

1  | Voyager 2 | Voyager 2 | 20 August 1977[2] | Titan IIIE Centaur-D1T[8] |  NASA | Flyby  | Successful
Discovered Neptunian rings and six new moons. Flew past Larissa, Proteus and Triton. Closest approach at 03:26 UTC on 25 August 1989[9]

## Pluto and trans-Neptunian objects

Main article: Astronomy:Exploration of Pluto

New Horizons is the only spacecraft that visited dwarf planet Pluto (in 2015) and the trans-Neptunian object 486958 Arrokoth (in 2019).

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator  | Mission Type  | Outcome

|
|
|
|
|
|

1  | New Horizons | New Horizons | 19 January 2006  | Atlas V (551) AV-010 + Star 48B 3rd stage |  NASA | Flyby  | Successful
Flew by Pluto on July 14, 2015, flew past Arrokoth on 1 January 2019.

## Statistics

### Major milestones

Legend

Milestone achieved
Milestone not achieved
En route
† First to achieve

Planets  Country/Agency  | Jupiter  | Saturn  | Uranus  | Neptune

|
|
|
|

Flyby  | Orbit  | Atmospheric entry  | Flyby  | Orbit  | Atmospheric entry  | Flyby  | Flyby
United States | Pioneer 10, 1973 †  | Galileo, 1995 †  | Atmospheric probe, 1995 †  | Pioneer 11, 1979 †  | Cassini, 2004 †  | Cassini, 2017 †  | Voyager 2, 1986 †  | Voyager 2, 1989 †
23px ESA | Ulysses, 1992 | Juice, TBD 2031 | —  | —  | —  | —  | —  | —
Galilean moons  Country/Agency  | Ganymede  | Callisto  | Io  | Europa

|
|
|
|

Flyby  | Orbit  | Impact  | Flyby  | Flyby  | Flyby
United States | Pioneer 10, 1973 †  | —  | Europa Clipper, TBD 2034 †  | Pioneer 10, 1973 †  | Pioneer 10, 1973 †  | Pioneer 10, 1973 †
23px ESA | Juice, TBD 2034 | Juice, TBD 2034 †  | Juice, TBD 2035  | —  | —  | —
Major Saturnian moons  Country/Agency  | Titan  | Rhea  | Iapetus  | Dione  | Tethys  | Enceladus  | Mimas

|
|
|
|
|
|
|

Flyby  | Orbit  | Lander  | Flyby  | Flyby  | Flyby  | Flyby  | Flyby  | Flyby
United States | Pioneer 11, 1979 †  | —  | —  | Pioneer 11, 1979 †  | Pioneer 11, 1979 †  | Pioneer 11, 1979 †  | Pioneer 11, 1979 †  | Pioneer 11, 1979 †  | Pioneer 11, 1979 †
23px ESA | —  | —  | Huygens, 2005 †  | —  | —  | —  | —  | —  | —

## Future missions

Mission  | Spacecraft  | Launch date  | Carrier rocket  | Operator

|
|
|
|

Planned missions
Dragonfly  | Dragonfly | TBD July 2028  | Falcon Heavy |  NASA
Titan robotic rotorcraft
Tianwen-4 | Tianwen-4 | TBD September 2029  | Long March 5 |  CNSA
Uranus flyby probe
Jupiter and Callisto orbiter; Flyby past Uranus with mission extension planned for interstellar journey
Solar Polar Orbit Observatory | Solar Polar Orbit Observatory  | NET 2029  | TBD  |  CNSA
Will use a Jupiter gravity assist to reach high-inclination heliocentric orbit
ESA Enceladus mission  | TBD | Early 2040s  | Ariane 6 | 23px ESA
L4 mission in the ESA Science Programme's Voyage 2050 campaign.[26][27]
Proposed missions
IHP-1  | Shensuo | TBD  | TBD  |  CNSA
Interstellar heliospheric probe with Jovian gravity assist; planned flybys of Jupiter and 50000 Quaoar
IHP-2  | Shensuo | TBD  | TBD  |  CNSA
Interstellar heliospheric probe with Jovian gravity assist; planned flybys of Jupiter, Neptune, Triton and a Kuiper belt object
Uranus Orbiter and Probe | Uranus orbiter | NET 2031  | Falcon Heavy (expendable) |  NASA
Uranus probe
Uranus orbiter after a flyby of Jupiter; Uranus atmospheric probe
Enceladus Orbilander | Enceladus Orbilander | NET 2038  |  |  NASA
Enceladus orbiter/lander

## See also

* Timeline of Solar System exploration
* List of missions to Venus
* List of missions to the Moon
* List of missions to Mars
* List of missions to minor planets
* List of missions to comets
* List of extraterrestrial orbiters
* Interstellar probe
* List of artificial objects leaving the Solar System
* List of proposed Solar System probes
* Kuiper belt (approx. 30–50 AU, Pluto largest of this group)
* List of proposed missions to the outer planets
* List of trans-Neptunian objects (numbered, excludes comets, see Trans-Neptunian object)

## References

1. ↑ 1.0 1.1 NASA Jupiter Press Kit (pdf)
2. ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 2.13 McDowell, Jonathan. "Launch Log". Jonathan's Space Page. http://planet4589.org/space/log/launchlog.txt. Retrieved 6 January 2013.
3. ↑ 3.0 3.1 3.2 Krebs, Gunter. "Pioneer 10, 11, H". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/pioneer-1011.htm. Retrieved 6 January 2013.
4. ↑ "Solar System Exploration - Pioneer 10". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Pioneer_10. Retrieved 6 January 2013.
5. ↑ "Solar System Exploration - Pioneer 10". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?MCode=Pioneer_10&Display=ReadMore. Retrieved 6 January 2013.
6. ↑ "Solar System Exploration - Pioneer 11". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Pioneer_11. Retrieved 6 January 2013.
7. ↑ 7.0 7.1 "Solar System Exploration - Pioneer 11". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Pioneer_11&Display=ReadMore. Retrieved 6 January 2013.
8. ↑ 8.0 8.1 8.2 8.3 8.4 8.5 Krebs, Gunter. "Voyager 1, 2". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/voyager.htm. Retrieved 6 January 2013.
9. ↑ 9.0 9.1 9.2 9.3 9.4 "Solar System Exploration - Voyager 2". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Voyager_2&Display=ReadMore. Retrieved 6 January 2013.
10. ↑ 10.0 10.1 "Solar System Exploration - Voyager 1". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Voyager_1&Display=ReadMore. Retrieved 6 January 2013.
11. ↑ Krebs, Gunter. "Galileo". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/galileo.htm. Retrieved 6 January 2013.
12. ↑ 12.0 12.1 "Solar System Exploration - Galileo". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Galileo. Retrieved 6 January 2013.
13. ↑ "Solar System Exploration - Galileo". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Galileo&Display=ReadMore. Retrieved 6 January 2013.
14. ↑ "Solar System Exploration - Galileo - Dates". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Galileo&Display=Dates. Retrieved 6 January 2013.
15. ↑ Krebs, Gunter. "Ulyssees". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/ulysses.htm. Retrieved 6 January 2013.
16. ↑ "Solar System Exploration - Ulysses". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Ulysses&Display=ReadMore. Retrieved 6 January 2013.
17. ↑ "Ulysses - Encounter Trajectory". NASA Jet Propulsion Laboratory. Archived from the original on 16 February 2013. https://web.archive.org/web/20130216040047/http://ulysses.jpl.nasa.gov/science/Encounter.html. Retrieved 6 January 2013.
18. ↑ 18.0 18.1 Krebs, Gunter. "Cassini". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/cassini.htm. Retrieved 6 January 2013.
19. ↑ "Solar System Exploration - Cassini - Dates". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Cassini&Display=Dates. Retrieved 6 January 2013.
20. ↑ 20.0 20.1 Krebs, Gunter. "New Horizons". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/new-horizons.htm. Retrieved 6 January 2013.
21. ↑ Muller, Daniel. "New Horizons Full Mission Timeline". http://www.dmuller.net/spaceflight/mission.php?mission=newhorizons&appear=black&mtype=scet&showimg=yes&dispwide=no. Retrieved 6 January 2013.
22. ↑ "New Horizons targets Jupiter kick". BBC News. 19 January 2007. http://news.bbc.co.uk/1/hi/technology/6279423.stm. Retrieved 6 January 2013.
23. ↑ Krebs, Gunter. "Juno (New Frontiers 2)". Gunter's Space Page. http://space.skyrocket.de/doc_sdat/juno.htm. Retrieved 6 January 2013.
24. ↑ Amos, Jonathan (4 July 2016). "Juno probe enters into orbit around Jupiter". BBC News. https://www.bbc.com/news/science-environment-36710768. Retrieved 5 July 2016.
25. ↑ "Solar System Exploration - Cassini". NASA. http://solarsystem.nasa.gov/missions/profile.cfm?Sort=Target&Target=Jupiter&MCode=Cassini. Retrieved 6 January 2013.
26. ↑ Tillman, Nola Taylor (4 December 2025). "Inside ESA's L4 mission to Enceladus". https://www.astronomy.com/science/target-enceladus/.
27. ↑ Clery, Daniel (1 December 2025). "Seeking greater independence, Europe boosts space agency budget". https://www.science.org/content/article/seeking-greater-independence-europe-boosts-space-agency-budget.

* v
* t
* e

Space missions by destination

Planets|

* Mercury
* Venus
* Mars
* Outer planets
* Jupiter
* Saturn
* Uranus
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Others|

* The Moon
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Orbiters|

* Extraterrestrial orbiters
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* Objects in heliocentric orbit

* v
* t
* e

Spacecraft missions to Jupiter

Flybys|

* Pioneer program
* Pioneer 10
* 11
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* Voyager 1
* 2
* Ulysses
* Cassini–Huygens
* New Horizons

Orbiters|

* Galileo
* Juno (active)

Atmospheric probes|

* Galileo Probe

Planned missions|

* Jupiter Icy Moons Explorer (JUICE) (2022)
* Europa Clipper (2023)

Proposed missions|

* Io Volcano Observer (2021)
* Laplace-P (2023)
* Europa Lander (2024)
* FIRE (2024)
* OKEANOS (2027)
* Smara (2030)

Cancelled / Concepts|

* Argo (proposed)
* Europa Jupiter System Mission-Laplace
* Jupiter Europa Orbiter
* Jupiter Ganymede Orbiter
* Jupiter Magnetospheric Orbiter
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* Neptune Orbiter
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Related topics|

* Exploration of Jupiter
* Atmosphere of Jupiter
* Magnetosphere of Jupiter
* Moons of Jupiter
* Io
* Exploration
* Europa
* Colonization
* Ganymede
* Callisto
* Rings of Jupiter
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* Missions to the outer planets
* Colonization of the outer Solar System

* v
* t
* e

Spacecraft missions to Saturn

Past|

| Flybys|

* Pioneer 11
* Voyager 1
* Voyager 2

|

Orbiters|

* Cassini–Huygens
* timeline
* retirement

Landers|

* Huygens (on Titan)

Planned|

* Dragonfly (to Titan, 2026)

Proposed|

| to Saturn and rings|

* Kronos
* Saturn Atmospheric Entry Probe
* SPRITE
* Titan Saturn System Mission

|

to Enceladus|

* Enceladus Life Finder
* Enceladus Explorer
* Life Investigation For Enceladus

to Titan|

* AVIATR
* Oceanus
* TALISE
* Titan Mare Explorer

to several moons|

* Explorer of Enceladus and Titan
* Journey to Enceladus and Titan

* There are no ongoing missions to Saturn

Links to related articles

* v
* t
* e

Jupiter

* Outline of Jupiter

Geography|

* Atmosphere
* Great Red Spot
* Magnetosphere
* Rings

Moons|

| Inner moons|

* Adrastea
* Amalthea
* Metis
* Thebe

|

Galilean moons|

* Callisto
* Europa
* Ganymede
* Io

Irregular moons|

* Ananke group
* Carme group
* Himalia group
* Pasiphae group

Ungrouped moons|

* Carpo
* Themisto
* Valetudo

Astronomy|

| General|

* Jupiter-crossing minor planets
* Solar eclipses

|

Trojans|

* Greek camp
* Trojan camp

Impact events|

* Comet Shoemaker–Levy 9
* 2009 Jupiter impact event
* 2010 Jupiter impact event

Exploration and
orbiting missions|

| Current|

* Juno

|

Past|

* Cassini
* Galileo
* New Horizons
* Pioneer program
* Pioneer 10
* Pioneer 11
* Ulysses
* Voyager program
* Voyager 1
* Voyager 2

Future|

* Jupiter Icy Moons Explorer (2022)
* Europa Clipper (2025)

Proposed|

* Io Volcano Observer (2021)
* Laplace-P (2023)
* Smara (2030)

Related|

* Fiction
* Jovian
* Moons
* Mythology

* Book
* Category

* v
* t
* e

Saturn

* Outline of Saturn

Geography|

* Dragon Storm
* Great White Spot
* Hexagon
* Magnetosphere
* Rings

Moons|

* S/2009 S 1
* Ring moonlets
* Pan
* Daphnis
* Atlas
* Prometheus
* S/2004 S 6
* S/2004 S 4
* S/2004 S 3
* Pandora
* Epimetheus
* Janus
* Aegaeon
* Mimas
* Methone
* Anthe
* Pallene
* Enceladus
* Tethys
* Telesto
* Calypso
* Dione
* Helene
* Polydeuces
* Rhea
* Titan
* Hyperion
* Iapetus
* Kiviuq
* Ijiraq
* Phoebe
* Paaliaq
* Skathi
* S/2004 S 37
* Albiorix
* S/2007 S 2
* S/2004 S 29
* Bebhionn
* Erriapus
* Skoll
* S/2004 S 31
* Siarnaq
* Tarqeq
* S/2004 S 13
* Greip
* Hyrrokkin
* Jarnsaxa
* Tarvos
* Mundilfari
* S/2006 S 1
* S/2004 S 17
* Bergelmir
* Narvi
* S/2004 S 20
* Suttungr
* Hati
* S/2004 S 12
* S/2004 S 27
* Farbauti
* Thrymr
* S/2004 S 30
* Aegir
* S/2007 S 3
* Bestla
* S/2004 S 7
* S/2004 S 22
* S/2004 S 23
* S/2004 S 25
* S/2004 S 32
* S/2006 S 3
* S/2004 S 38
* Fenrir
* S/2004 S 28
* Surtur
* Kari
* S/2004 S 35
* Ymir
* S/2004 S 21
* S/2004 S 24
* Loge
* S/2004 S 36
* S/2004 S 39
* S/2004 S 33
* S/2004 S 34
* Fornjot
* S/2004 S 26

Astronomy|

* Delta Octantis
* Saturn-crossing minor planets

Exploration|

* Cassini–Huygens (Huygens)
* timeline
* retirement
* Pioneer 11
* Voyager program
* Voyager 1
* Voyager 2

Related|

* Fiction
* Moons
* The Day the Earth Smiled
* In Saturn's Rings (2018 documentary)

* v
* t
* e

Uranus (Outline of Uranus

Geography|

* Atmosphere
* Climate
* Dark Spot
* Magnetosphere
* Rings

NASA image of Uranus

Moons|

* Ariel
* Miranda
* Oberon
* Puck
* Titania
* Umbriel

Astronomy|

| Discovery|

* William Herschel
* Gerard Kuiper
* James L. Elliot
* William Lassell

|

General|

* 15 Orionis
* Uranus-crossing minor planets

Trojans|

* 2011 QF99
* 2014 YX49

Exploration|

| Past|

* Voyager 2 (1986 flyby)

|

Proposals|

* MUSE
* Oceanus
* ODINUS
* NASA Uranus orbiter and probe
* Uranus Pathfinder

Related|

* Fiction

* Category

* v
* t
* e

Neptune

* Outline of Neptune

Geography|

* Great Dark Spot
* Small Dark Spot
* Rings

NASA image of Neptune

Moons|

* Despina
* Galatea
* Halimede
* Hippocamp
* Laomedeia
* Larissa
* Naiad
* Nereid
* Neso
* Proteus
* Psamathe
* Sao
* Thalassa
* Triton

Astronomy|

| Discovery|

* Urbain Le Verrier
* Johann Gottfried Galle
* John Couch Adams
* Heinrich Louis d'Arrest
* William Lassell

|

General|

* Kuiper belt
* Neptune-crossing minor planets

Trojans|

* 2001 QR322
* 2004 KV18
* 2004 UP10
* 2005 TN53
* 2005 TO74
* 2006 RJ103
* (527604) 2007 VL305
* 2008 LC18
* 2011 HM102

Exploration|

| Past|

* Voyager 2 (1989 flyby)

|

Proposals|

* ODINUS
* Triton Hopper
* Argo
* Trident

Cancelled|

* Mariner Mark II
* Neptune Orbiter
* New Horizons 2

Related|

* Fiction
* Mythology

* Book
* Category
* Portal

* v
* t
* e

Pluto

Geography
(features)|

| Regions|

* "Brass Knuckles"
* Krun
* Ala
* Balrog
* Vucub-Came
* Hun-Came
* Meng-p'o
* Cadejo
* Cthulhu
* Hayabusa
* Lowell
* Morgoth
* Pioneer
* Tombaugh "The Heart"
* Venera
* Viking
* Voyager

|

Mountains|

* Challenger Colles
* Coleta de Dados Colles
* Hillary Montes
* Tenzing Montes

Plains|

* Sputnik Planitia

Valleys and
depressions|

* Quidlivun Cavus

Lineae|

* Luna Linea

General|

* Atmosphere
* Geology

Moons|

| Charon
(features)|

| Regions|

* Gallifrey
* Mordor
* Vulcan

|

Mountains|

* Kubrick Mons

Chasms|

* Nostromo Chasma

Craters|

* Kirk Crater
* Ripley Crater
* Vader Crater

Geology|

* Geology

Other moons|

* Styx
* Nix
* Kerberos
* Hydra

Astronomy|

| Definition|

* Alan Stern
* Definition of planet
* Double planet
* Dwarf planet
* IAU definition of planet
* International Astronomical Union
* Michael E. Brown
* Neil deGrasse Tyson
* Planet
* Plutino
* Plutoid
* Trans-Neptunian object

|

Discovery|

* Clyde Tombaugh
* James W. Christy
* Lowell Observatory
* Percival Lowell
* Planet X
* Roger Putnam

Eclipses|

* Solar eclipses on Pluto

General|

* Kuiper belt

Exploration|

| Current|

* Hubble Space Telescope

|

Former|

* New Horizons

Cancelled|

* Pluto Fast Flyby/Pluto Kuiper Express
* Mariner Mark II

Old proposals|

* Voyager 1
* TAU

Related|

* Venetia Burney
* Pluto in fiction
* Mythology

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Original source: https://en.wikipedia.org/wiki/List of missions to the outer planets. Read more

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