Uranus

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Uranus : the planet seventh in order from the sun — Webster

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Uranus is the 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. For this reason, scientists often classify Uranus and Neptune as “ice giants” to distinguish them from the gas giants. Uranus’s atmosphere is similar to Jupiter’s and Saturn’s in its primary composition of hydrogen and helium, but it contains more “ices” such as water, ammonia, and methane, along with traces of other hydrocarbons. It is the coldest planetary atmosphere in the Solar System, with a minimum temperature of 49 K (−224 °C; −371 °F), 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 ices and rock.

Uranus is the only planet whose name is derived from a figure from Greek mythology, from the Latinised version of the Greek god of the sky Ouranos. Like the other giant planets, Uranus has a ring system, a magnetosphere, and numerous moons. The Uranian system has a unique configuration among those of the planets because its axis of rotation is tilted sideways, nearly into the plane of its solar orbit. Its north and south poles, therefore, lie where most other planets have their equators. In 1986, images from Voyager 2 showed Uranus as an almost featureless planet in visible light, without the cloud bands or storms associated with the other giant planets. Observations from Earth have shown seasonal change and increased weather activity as Uranus approached its equinox in 2007. Wind speeds can reach 250 metres per second (900 km/h; 560 mph). — Wikipedia

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Uranus News -- ScienceDaily Uranus News. See images of the bright blue ring discovered around Uranus. Read science articles on the planet Uranus and more.

  • NASA investigates invisible magnetic bubbles in...
    on November 1, 2017 at 7:12 pm

    Forty years ago, the twin Voyagers spacecraft were launched to explore the frontiers of our solar system, and have since made countless discoveries, including finding magnetic bubbles around two of the outer planets. […]

  • Scientists probe Neptune's depths to reveal...
    on August 11, 2017 at 1:37 pm

    Scientists have helped solve the mystery of what lies beneath the surface of Neptune -- the most distant planet in our solar system. […]

  • Topsy-turvy motion creates light switch effect at...
    on June 26, 2017 at 1:34 pm

    Uranus' magnetosphere, the region defined by the planet's magnetic field and the material trapped inside it, gets flipped on and off like a light switch every day as it rotates along with the planet, scientists have discovered. It's 'open' in one orientation, allowing solar wind to flow into the magnetosphere; it later closes, forming a shield against the solar wind and deflecting it away from the planet. […]

  • Primitive atmosphere discovered around 'Warm...
    on May 11, 2017 at 6:19 pm

    A pioneering new study uncovering the 'primitive atmosphere' surrounding a distant world could provide a pivotal breakthrough in the search to how planets form and develop in far-flung galaxies. […]

  • Solar system: New insights into ring system
    on April 28, 2017 at 1:38 pm

    Astronomers have modeled the two rings around Chariklo, the smallest body in the Solar System known to have rings. This is the first time an entire ring system has been simulated using realistic sizes for the ring particles. The simulation revealed that the ring particles are much smaller than predicted or that an undiscovered shepherd satellite around Chariklo is stabilizing the ring. […]