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Neptune has been directly explored by one space probe, Voyager 2, in 1989. As of 2024 [update] , there are no confirmed future missions to visit the Neptunian system, although a tentative Chinese mission has been planned for launch in 2024. [ 1 ]
The record for most time in space is held by Russian cosmonaut Oleg Kononenko, who has spent 1,111 days in space over five missions. He broke the record of Gennady Padalka on 4 February 2024 at 07:30:08 UTC during his fifth spaceflight aboard Soyuz MS-24 / 25 for a one year long-duration mission on the ISS . [ 21 ]
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.
Histories of the Space Tracking and Data Acquisition Network (STADAN), the Manned Space Flight Network (MSFN), and the NASA Communications Network (NASCOM). NASA SP-2007-4233 - Sunny Tsiao (2007). "Read You Loud and Clear!" The Story of NASA's Spaceflight Tracking and Data Network. Network stations list; STADAN Station in Shoe Cove, Newfoundland
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 ...
A launch status check, also known as a "go/no go poll" and several other terms, occurs at the beginning of an American spaceflight mission in which flight controllers monitoring various systems are queried for operation and readiness status before a launch can proceed.
landing test, meteorological observation, crashed upon landing [35] InSight: NASA: 26 November 2018 – 21 December 2022 lander success studied the deep interior of Mars, with a seismometer and a heat-flow probe. [36] 2018-042A [37] MarCO A "WALL-E" NASA: 26 November 2018 flyby success relaying data from InSight during its entry, descent, and ...
C] While in the neighborhood of Neptune, Voyager 2 discovered the "Great Dark Spot", which has since disappeared, according to observations by the Hubble Space Telescope. [66] The Great Dark Spot was later hypothesized to be a region of clear gas, forming a window in the planet's high-altitude methane cloud deck.