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URANUS
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Facts Farthest planet able to be seen without a telescope
1,787,000,000 miles from the sun Takes light 2 hours, 40 minutes to reach Earth Revolution = 84 years or 30,685 days Rotation = 17 hr 14 minutes
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Facts: 31,763 mile diameter (4x Earth)
Only planet named after a Greek rather than a Roman god Name comes from Latinized version of the Greek god of the sky- Ouranos
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Astronomer William Herschel discovered the planet in 1781
Uranus is an “Ice Giant” color is blue-green from frozen crystals of methane in clouds Clouds also have layers of liquid water and ammonia ice Has a rocky core surrounded by layers of ice
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Facts: Axis tilt is 98o Hypothesized that a collision with an Earth-sized object knocked the tilt to its present position Second least dense planet (behind Saturn)- density = 1.27 gm/mL
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Mass 14 ½ x greater than Earth 1/20 the mass of Jupiter
100 lbs on Earth = 90 lbs on Uranus Greater volume compared to its mass results in lower gravity than Earth
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ATMOSPHERE 83 % H, 15 % He, and 2 % methane
Temperature = -355o F in atmosphere 8,500o F in rocky core (compared to 42,000o F for Jupiter’s core) Poles receive more sunlight than equator Winds of about 450 mph
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SATELLITES 27 known satellites
All are named after characters from the works of William Shakespeare and Alexander Pope
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SATELLITES Miranda (second from Uranus above) has “ovoids”, features which resemble a racetrack with crisscrossing ridges
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RINGS More than 10 Range from 3 to 60 miles wide
No more than 33 ft thick
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EXPLORATION Voyager 2 in 1985 and 1986 Podcast on Uranus:
Short video on Uranus:
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