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The radio instruments on board found that Neptune's day lasts 16 hours and 6.7 minutes. Neptune's rings had been observed from Earth many years prior to Voyager 2 's visit, but the close inspection revealed that the ring systems were full circle and intact, and a total of four rings were counted. [4] Voyager 2 discovered six new small moons ...
193 days (6 mo, 9 d) The Mars 2 lander crashed into Mars on 27 November 1971, in a failed soft landing attempt. It was the first manmade object to reach the surface of Mars. The orbiter continued operating until 22 August 1972. [6] [7] Mars 3 Orbiter and Lander: Mars 28 May 1971 2 December 1971 entered orbit/landed: 189 days (6 mo, 5 d)
Later flew past Saturn, Uranus and Neptune. Oldest active space probe at 47 years, 6 months, 6 days. Currently studying interstellar medium. At a distance of 136.1 AU (20.4 billion km; 12.7 billion mi) from Earth as of May 2024 [9] 4 Voyager 1: Voyager 1: 5 September 1977 [2] Titan IIIE Centaur-D1T [8] NASA: Flyby Successful
Neptune has long been known to have white clouds circling it, but images of the furthest planet in the solar system have shown this changing over time - the most recent image, taken by the Hubble ...
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A similar scenario unfolded in 2004 with Apophis, an asteroid initially projected to have a 2.7% chance of striking Earth in 2029. Further observations ruled out an impact. "City killer" category
landed: landed: Rendezvoused with asteroid from June 2018 to November 2019. Successful touchdowns to collect a sample in February and July 2019. [2] Three landers and an explosive impactor successfully deployed to the surface. [3] Returned dust samples to Earth in December 2020. [4] 101955 Bennu: 0.490: 1999 OSIRIS-REx: 2018-2020: landed: landed
The timeline of discovery of Solar System planets and their natural satellites charts the progress of the discovery of new bodies over history. Each object is listed in chronological order of its discovery (multiple dates occur when the moments of imaging, observation, and publication differ), identified through its various designations (including temporary and permanent schemes), and the ...