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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. One spacecraft, Voyager 2, also visited Uranus and Neptune.
Voyager 2 's observation phase proper of Neptune began 5 June 1989, the spacecraft officially reached the Neptunian system on 25 August, and data collection ceased on 2 October. [4] Initially it was planned to use a trajectory that resulted in Voyager 2 passing around 1,300 km (810 mi) from Neptune and 8,200 km (5,100 mi) from Triton. [ 5 ]
This is a list of space probes that have left Earth orbit (or were launched with that intention but failed), 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.
Both moons, which bring the total of Neptune’s known natural satellites to 18, were first spotted in September 2021, but required follow-up observations with different telescopes over the past ...
Cancelled due to shortage of plutonium-238 required for the radioisotope thermoelectric generators (RTG). [37] Would've focused on Neptune and its largest moon, Triton, addressing questions raised by Voyager 2's 1989 flyby [128] and would've provided insights into the formation and evolution of ice giants. [129] 2 Neptune Odyssey: Neptune ...
Solar System space probes operational as of November 2024. This is a list of active space probes which have escaped Earth orbit. It includes lunar space probes, but does not include space probes orbiting at the Sun–Earth Lagrangian points (for these, see List of objects at Lagrangian points). A craft is deemed "active" if it is still able to ...
Space probe broke orbit on 5 September 2012 and headed to Ceres; first "big four" asteroid visited by a spacecraft, largest asteroid visited by a spacecraft at the time. 4179 Toutatis: 2.45: 1934 Chang'e 2: 2012 3.2 0.70 Flyby; [1] closest asteroid flyby, first asteroid visited by a Chinese probe. 1 Ceres: 939.4 1801 Dawn: 2015–2018: 35 0.07
A daring deep sea search has found tiny pieces of a mysterious meteor that crashed to Earth in 2014. The ‘alien hunter of Harvard’ tells Bevan Hurley the discovery may be evidence of an ...