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With time, discrepancies began ... flowing with Uranus's rotation. ... the proposal envisaged launch during 2020–2023 and a 13-year cruise to Uranus. [167] ...
In astronomy, the rotation period or spin period [1] of a celestial object (e.g., star, planet, moon, asteroid) has two definitions. The first one corresponds to the sidereal rotation period (or sidereal day), i.e., the time that the object takes to complete a full rotation around its axis relative to the background stars (inertial space).
Uranus V Uranus I Uranus II Uranus III Uranus IV Neptune I Pluto I Symbol SVI SVIII UV UI UII UIII UIV NI PI Discovery year 1655 1671 1948 1851 1851 1787 1787 1846 1978 Mean distance from primary km 1,221,870 3,560,820 129,390 190,900 266,000 436,300 583,519 354,759 17,536 Mean radius: km :E: 2,576 0.404 735.60 0.115 235.8 0.037 578.9 0.091 584.7
NASA’s Voyager 2 flyby in 1986 provided the only close-up look at Uranus. Nearly 40 years later, scientists are looking back at this data and finding out the visit happened during a strange ...
“The spacecraft saw Uranus in conditions that only occur about 4% of the time.” An image of the planet Uranus taken by the NASA spacecraft Voyager 2 in 1986.
Five planets are going to be retrograde in the summer of 2024. Here are the dates for Mercury retrograde, Venus retrograde, Saturn retrograde, Neptune retrograde, Pluto retrograde and more.
Uranus: 171.4 127.0 118.7 98.93 Neptune: ... Rotation period – time that it takes to complete one revolution around its axis ... Sidereal time; Sidereal year ...
At that time, Uranus, Neptune, nor the asteroid belts had been discovered yet. ... Rotation period, gross surface properties. ... Uranus Neptune Pluto End year 1 ...