List of Solar System probes


This is a list of space probes that have left Earth orbit, organized by their planned destination. It includes planetary probes, solar probes, and probes to asteroids and comets, but excludes lunar missions, which are listed separately at List of lunar probes and List of Apollo missions. Flybys that were incidental to the main purpose of the mission are also included. Flybys of Earth are listed separately at List of Earth flybys. Confirmed future probes are included, but missions that are still at the concept stage, or which never progressed beyond the concept stage, are not.

Key

Colour key:
While the Sun is not physically explorable with current technology, the following solar observation probes have been designed and launched to operate in heliocentric orbit or at one of the Earth–Sun Lagrangian points – additional solar observatories were placed in Earth orbit and are not included in this list:

1960–1969

1974–1997

2000–present

Proposed

Mercury">Mercury (planet)">Mercury probes

[Venus] probes

1961–1969

1970–1978

1982–1999

2006–present

Proposed

[Earth] flybys

In addition, several planetary probes have sent back observations of the Earth-Moon system shortly after launch, most notably Mariner 10, Pioneers 10 and 11 and both Voyager probes.

Lunar">Moon">Lunar probes

[Mars] probes

1960–1969

1971–1976

1988–1999

2001–2009

2011–2018

2020–Present

Proposed

Phobos">Phobos (moon)">Phobos probes

Ceres">Ceres (dwarf planet)">Ceres probes

[Asteroid] probes

[Jupiter] probes

[Saturn] probes

Titan">Titan (moon)">Titan probes

[Uranus] probes

[Neptune] probes

[Pluto] probes

[Comet] probes

[Kuiper Belt] probes

Probes leaving the Solar System

SpacecraftOrganizationNotesImageRef
Pioneer 10 NASALeft Jupiter in December 1973. Mission ended March 1997. Last contact 23 January 2003. Craft now presumed dead; no further contact attempts planned.
Pioneer 11 NASALeft Saturn in September 1979. Last contact September 1995. The craft's antenna cannot be maneuvered to point to Earth, and it is not known if it is still transmitting. No further contact attempts are planned.
Voyager 1 NASALeft Saturn in November 1980. Still in regular contact and transmitting scientific data.
Voyager 2 NASALeft Neptune in August 1989. Still in regular contact and transmitting scientific data.
New Horizons NASALeft Pluto 14 July 2015; flew by Kuiper belt object on 1 January 2019 when it was 43.4 AU from the Sun.
IHP-1 CNSAProposed Interstellar Heliosphere Probe with a 2024 launch date. Anticipated to reach a distance of at least 85 AU from Earth by 2049
IHP-2 CNSAProposed Interstellar Heliosphere Probe with a 2024 launch date. Anticipated to reach a distance of at least 83 AU from Earth by 2049

Other probes to leave Earth orbit

For completeness, this section lists probes that have left Earth orbit, but are not primarily targeted at any of the above bodies.

Cancelled probes and missions