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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.
The revelations will be helpful for missions that may be planned to explore Uranus and Neptune more closely in the future, a priority for astronomers since the ice planets were only observed in ...
However, the NEOWISE mission concluded its science survey on 31 July 2024 with the satellite expected to reenter Earth's atmosphere later the same year (2 November 2024). This decision was made due to increased solar activity hastening the decay of its orbit and the lack of an onboard propulsion system for orbital maintenance.
A cancelled mission concept in the New Frontiers program, a flyby mission to visit Jupiter, Saturn, Neptune (with Triton) and the Kuiper belt with launch in 2019. cancelled New Horizons 2: NASA: flyby A cancelled mission concept for a flyby mission to the Neptune system and Kuiper belt based on the New Horizons space probe. cancelled Nautilus ...
The Great Dark Spot was an Earth-sized vortex observed in the southern hemisphere of Neptune by Voyager 2 in 1989. [35] The storm had some of the highest recorded wind speeds in the Solar System at approximately 2,400 km/h (1,500 mph) and rotated around the planet once every 18.3 hours. [ 36 ]
Voyager 2 is the only space probe to have visited the Neptune system, completing a flyby on August 25, 1989. An orbiter to Neptune was considered as part of the aborted Mariner Mark II program in the 1990s, and several mission concepts for an orbiter were developed in the 2000s, including a concept by the California Institute of Technology [4] and a version by the University of Idaho and ...
S/2021 N 1 is the smallest, faintest, and most distant natural satellite of Neptune known, with a diameter of around 16–25 km (10–16 mi). It was discovered on 7 September 2021 by Scott S. Sheppard, David J. Tholen, Chad Trujillo, and Patryk S. Lykawka using the 8.2-meter Subaru Telescope at Mauna Kea, Hawaii, and later announced on 23 February 2024. [1]
Shensuo (Chinese: 神梭), formerly Interstellar Express, [6] is a proposed Chinese National Space Administration program designed to explore the heliosphere and interstellar space. [3] The program will feature two or three space probes that were initially planned to be launched in 2024 and follow differing trajectories to encounter Jupiter to ...