Uranus is the seventh planet from the Sun.
It is a gas giant, the third largest by diameter and fourth largest by mass.
NASA's Voyager 2 is the only spacecraft to have visited the planet and no other visits are currently planned.
Launched in 1977, Voyager 2 made its closest approach to Uranus on January 24, 1986, before continuing its journey to Neptune.
Uranus is the first planet discovered in modern times.
Sir William Herschel formally discovered the planet on March 13, 1781; the other planets (from Mercury out to Saturn) have been known since ancient times, and Uranus' discovery expanded the boundaries of the solar system for the first time in modern human history.
It was also the first planet discovered using technology (a telescope) rather than the naked eye.
Mercury (planet) Mercury is the innermost and smallest planet in the solar system, orbiting the Sun once every 88 days. It ranges in brightness from about −2.0 ... >
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Precession Precession refers to a change in the direction of the axis of a rotating object. In certain contexts, "precession" may refer to the precession that ... >
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Saturn Saturn is the sixth planet from the Sun. It is a gas giant, the second-largest planet in the solar system after Jupiter. Saturn has a prominent ... >
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Phobos (moon) Phobos is the larger and innermost of Mars' two moons, and is named after Phobos, son of Ares (Mars) from Greek Mythology. Phobos orbits closer to a ... >
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Neptune Neptune is the eighth and outermost planet in our solar system. It is the fourth-largest planet by diameter and the third-largest by mass; Neptune is ... >
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Deimos (moon) Deimos is probably an asteroid that was perturbed by Jupiter into an orbit that allowed it to be captured by Mars, though this hypothesis is still in ... >
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Shift of equinox The precession of the equinoxes refers to the precession of Earth's axis of rotation with respect to inertial space. The precession of the equinoxes ... >
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Dysnomia (moon of Eris) Dysnomia, is a moon of the dwarf planet Eris. The satellite is about 60 times fainter than Eris, and its diameter is estimated to be approximately ... >
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Geosynchronous orbit A geosynchronous orbit is a geocentric orbit that has the same orbital period as the sidereal rotation period of the Earth. It has a semi-major axis ... >
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Jupiter Jupiter is the fifth planet from the Sun and by far the largest within the solar system. Jupiter is usually the fourth brightest object in the sky ... >
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