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Space probe |
Launch year |
Significant event |
Objective |
Current status |
Distance from the Sun in AU |
Pioneer 10 | 1972 | Flew past Saturn in 1979 | Study the asteroid belt, the environment around Jupiter and Saturn, solar wind and cosmic rays. | Contact lost in 2003 | ~ 120 AU |
Pioneer 11 | 1973 | Flew past Saturn in 1979 | Contact lost in 1995 | ~ 90 AU | |
Voyager 2 |
Aug 1977 | Passed the heliopause in December 2018 to enter interstellar space (second artificial object to leave the solar system). | Explore all Jovian planets.
Extended mission of both the Voyagers is to study the outer reaches of the Solar System. |
Active |
~ 129 AU (as of Jan 2022) |
Voyager 1 |
Sep 1977 |
Passed the heliopause in 2012 to enter interstellar space (first artificial object to leave the solar system). |
Explore Jupiter, Saturn, and Saturn’s largest moon, Titan. |
Active |
~ 155 AU (as of Jan 2022) |
New Horizons |
2006 | Flew past Pluto in 2015. It is currently travelling through Kuiper belt. | To perform a study of Pluto, and more other Kuiper belt objects. |
Active |
~ 53 AU (as of Jan 2022) |
Juno |
2011 | Entered a polar orbit of Jupiter in 2016 | Study Jupiter’s composition, gravitational field, magnetic field, etc. |
Active |
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