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See File:Uranus's astrological symbol.svg for the planet's astrological symbol. Español: U+26E2 ⛢: Símbolo astronómico del planeta Urano y un símbolo alquímico del platino . Ver File:Uranus's astrological symbol.svg para el símbolo astrológico del planeta.
The lowest temperature recorded in Uranus's tropopause is 49 K (−224.2 °C; −371.5 °F), making Uranus the coldest planet in the Solar System. [ 18 ] [ 95 ] One of the hypotheses for this discrepancy suggests the Earth-sized impactor theorised to be behind Uranus's axial tilt left the planet with a depleted core temperature, as the impact ...
Uranus – seventh planet from the Sun. It has the third-largest planetary radius and fourth-largest planetary mass in the Solar System . Uranus is similar in composition to Neptune , and both have different bulk chemical composition from that of the larger gas giants Jupiter and Saturn .
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Umbriel, along with another Uranian satellite, Ariel, was discovered by William Lassell on October 24, 1851. [10] [11] [12] Although William Herschel, the discoverer of Titania and Oberon, claimed at the end of the 18th century that he had observed four additional moons of Uranus, [13] his observations were not confirmed and those four objects are now thought to be spurious.
In the 1990s, it was determined that Uranus and Neptune were a distinct class of giant planet, separate from the other giant planets, Jupiter and Saturn, which are gas giants predominantly composed of hydrogen and helium. [1] Neptune and Uranus are now referred to as ice giants. Lacking well-defined solid surfaces, they are primarily composed ...