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Planet
[ Planet ]

·Astronomy: Planet - THE VIKINGS
·Astronomy: Planet - THE PIONEER SPIRIT
·Astronomy: Planet - MARINER MISSIONS
·Astronomy: Planet - THE FIRST JOURNEYS
·Astronomy: Planet - TO THE PLANETS
 

 
 
Astronomy & Telescope Astronomy: Uranus

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  Uranus Uranus: Astronomy: Uranus - SMASHING MOONS

SMASHING MOONS

The first two of Uranus's five large moons, Titania and Oberon, were found by William Herschel in 1787. The third and fourth moons, Ariel and Umbriel, were not discovered until 1851. Miranda, the fifth, held out until 1948. These major moons certainly pose a challenge to observers: the brightest is Titania, at magnitude 13.7, and the dimmest, Miranda, is 16th magnitude.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:25:18 CST (33 reads)
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  Uranus Uranus: Astronomy: Uranus - Ring-SLIM RINGS

SLIM RINGS

In March 1977, astronomers watched Uranus slide in front of a 9th magnitude star and discovered that Uranus has rings. The Voyager 2 flyby confirmed that Uranus has 11 rings, as well as several ring-arcs, or partial rings.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:24:23 CST (32 reads)
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  Uranus Uranus: Astronomy: Uranus - Orbit-ORBITING SIDEWAYS

ORBITING SIDEWAYS

Uranus orbits almost "on its side" at a tilt of 98 degrees, possibly as a result of a collision with an Earth-size object early in its history. Its moons and rings may be leftover fragments from this impacting body. The tilt gives the planet peculiar seasons, with one pole or the other pointing to

 
 
  Posted by astronomy on Saturday, December 11 @ 01:23:22 CST (30 reads)
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  Uranus Uranus: Astronomy: Uranus - Feature-WATCH THIS SPACE

WATCH THIS SPACE

At the time of the Voyager 2 flyby, Uranus displayed an all-but-blank appearance. This disappointed many scientists, who had hoped to find atmospheric features like those of Jupiter. Any features the planet had were hidden deep in the hydrogen-methane haze.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:22:17 CST (27 reads)
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  Uranus Uranus: Astronomy: Uranus - A BIG BLUE WORLD

A BIG BLUE WORLD

The planet's density, 1.3 times that of water, groups Uranus with the other gas giants, such as Jupiter. Its atmosphere is mostly hydrogen and helium, with some methane.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:21:28 CST (29 reads)
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  Uranus Uranus: Astronomy: Uranus

URANUS

This distant, blue-green planet is something of a mystery. Even after Voyager 2's flyby in 1986, there remains great deal for future astronomers to discover.

 
 
  Posted by astronomy on Saturday, December 11 @ 01:20:35 CST (27 reads)
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