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  2. Uranus - Wikipedia

    en.wikipedia.org/wiki/Uranus

    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 ...

  3. Climate of Uranus - Wikipedia

    en.wikipedia.org/wiki/Climate_of_Uranus

    The lowest temperature recorded in Uranus's tropopause is 49 K (−224 °C), making Uranus the coldest planet in the Solar System, colder than Neptune. [ 22 ] [ 23 ] Another hypothesis states that when Uranus was "knocked over" by the supermassive impactor which caused its extreme axial tilt, the event also caused it to expel most of its ...

  4. List of Solar System extremes - Wikipedia

    en.wikipedia.org/wiki/List_of_Solar_System_extremes

    Yale-New Haven Teachers Institute, 07.03.03: "Voyage to the Planets" by Nicholas R. Perrone, 2007 (accessed November 2010) Journey Through the Galaxy: "Planets of the Solar System" by Stuart Robbins and David McDonald, 2006 (accessed November 2010) The Nine Planets, "Appendix 2: Solar System Extrema" by Bill Arnett, 2007 (accessed November 2010)

  5. NASA’s only visit to Uranus happened during a rare cosmic ...

    www.aol.com/nasa-only-visit-uranus-happened...

    However, there is still plenty that scientists don’t know about the solar system, our cosmic neighborhood. This week, researchers shared fascinating new findings on Uranus, the seventh planet ...

  6. Outline of Uranus - Wikipedia

    en.wikipedia.org/wiki/Outline_of_Uranus

    It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224.2 °C), and has a complex, layered cloud structure with water thought to make up the lowest clouds and methane the uppermost layer of clouds. The interior of Uranus is mainly composed of ice and rock.

  7. Atmosphere of Uranus - Wikipedia

    en.wikipedia.org/wiki/Atmosphere_of_Uranus

    Temperature profile of the Uranian troposphere and lower stratosphere. Cloud and haze layers are also indicated. The Uranian atmosphere can be divided into three main layers: the troposphere, between altitudes of −300 [a] and 50 km and pressures from 100 to 0.1 bar; the stratosphere, spanning altitudes between 50 and 4000 km and pressures between 0.1 and 10 −10 bar; and the thermosphere ...

  8. Scientists Thought They Knew What Uranus and Neptune ... - AOL

    www.aol.com/scientists-thought-knew-uranus...

    The ice giants Uranus and Neptune live up to their name. Although humans have only ever sent one spacecraft (Voyager 2) toward these far-flung worlds, scientists have a pretty good idea that these ...

  9. Ice giant - Wikipedia

    en.wikipedia.org/wiki/Ice_giant

    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 ...