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Eris was discovered in January ... The mass of Eris compared to ... It was calculated that a flyby mission to Eris would take 24.66 years using a Jupiter gravity ...
Jupiter III Galileo [9] [10] discovered the Galilean moons. These satellites were the first celestial objects that were confirmed to orbit an object other than the Sun or Earth. Galileo saw Io and Europa as a single point of light on 7 January 1610; they were seen as separate bodies the following night. [11] Callisto: Jupiter IV o: 8 January 1610
1979 – Voyager 1 flies by Jupiter and discovers its faint ring system, as well as volcanoes on Io, the innermost of its Galilean moons. [201] 1979 – Voyager 2 flies by Jupiter and discovers evidence of an ocean under the surface of its moon Europa. [202] 1980 – Voyager 1 flies by Saturn and takes the first images of Titan. [203]
Dwarf planet Eris, similar in size to its better-known cosmic cousin Pluto, has remained an enigma since being discovered in 2005 lurking in the solar system's far reaches. While Pluto was ...
Pluto – discovered February 18, 1930, and announced March 13. Considered a planet for 76 years. Explicitly reclassified as a dwarf planet by the IAU with Resolution 6A on August 24, 2006. [55] Five known moons. Eris (2003 UB 313) – discovered January 5, 2005, and announced July 29.
Jupiter/Saturn/first Uranus/first Neptune flyby [239] [240] [241] Voyager 1: 5 September 1977 Jupiter/Saturn flyby, first to exit the heliosphere [241] [242] [243] Pioneer Venus 1: 20 May 1978 Venus orbiter [244] [245] Pioneer Venus 2: 8 August 1978 Venus atmospheric probes [246] [247] ISEE-3: 12 August 1978
For example, if a TNO is incorrectly assumed to have a mass of 3.59 × 10 20 kg based on a radius of 350 km with a density of 2 g/cm 3 but is later discovered to have a radius of only 175 km with a density of 0.5 g/cm 3, its true mass would be only 1.12 × 10 19 kg.
NASA's Juno spacecraft captured this view of Jupiter during the mission's 54th close flyby of the giant planet Sept. 7, 2023.