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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 ...
A cancelled mission concept for a flyby mission to the Neptune system and Kuiper belt based on the New Horizons space probe. cancelled Nautilus: NASA: orbiter A Triton-focused Neptune orbiter baselined for the New Frontiers program, with launch in August 2042 and orbital insertion slated for April 2057. proposed [24] [25] Tianwen-5: CNSA: orbiter
Other planned Mariner Mark II-based spacecraft were an ESA led follow-on to CRAF, the Comet Nucleus Sample Return or CNSR (later Rosetta, without the sample return); Pluto Fast Flyby, a flyby of Pluto (later Pluto Kuiper Express, eventually realized as New Horizons); and a Neptune Orbiter with an atmospheric probe.
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]
Pioneer 10 crossed the orbit of Saturn in 1976 and the orbit of Uranus in 1979. [54] On June 13, 1983, the craft crossed the orbit of Neptune, and so became the first human-made object to leave the proximity of the major planets of the Solar System. The mission came to an official end on March 31, 1997, when it had reached a distance of 67 AU ...
ODINUS (Origins, Dynamics, and Interiors of the Neptunian and Uranian Systems) is a space mission concept proposed to the European Space Agency's Cosmic Vision programme. . The ODINUS mission concept proposes to expand the Uranus orbiter and probe mission to two twin orbiters— dubbed Freyr and Freyja, the twin gods of the Norse panth
Neptune, the smallest of its four gas planets, has a diameter of about 30,600 miles (49,250 km), roughly four times that of Earth. The newly discovered sub-Neptunes range from 1.9 to 2.9 times ...
385571 Otrera, provisional designation 2004 UP 10, is a Neptune trojan leading Neptune's orbit in the outer Solar System.It was discovered by American astronomers Scott Sheppard and Chad Trujillo at Las Campanas Observatory on 16 October 2004. [2]