named after the Greek god of the sky, was
discovered on March 13, 1781, (the first planet found
using a telescope) by British
astronomer William Herschel who
originally believed it to be a comet. It's the
seventh planet from the Sun orbiting at
a distance of
2,876,679,082 km or 19.23 AU, the third largest with a diameter of
51,118 km and the fourth most massive.
2 gathered valuable information as it passed by on its way to Neptune.
The spacecraft's closest approach was on January 24, 1986.
like Neptune is often referred to as a gas giant, but like
its neighbor a more appropriate title would probably be ice giant.
atmosphere is thin (as compared to the true gas giants Jupiter
mostly hydrogen (83%) helium (15%) and Methane, Acetylene and other
hydrocarbons (2%) with a mean cloud
temperature of -193 °C. Its
interior is composed primarily of
water, ammonia and methane ices surrounding a small rocky core.
Uranus has an axial tilt
of 97.77 degrees, which places it on its side with respect to the plane
of the ecliptic. (The poles are where most planets have their equators.)
has a faint ring system  composed of eleven darkly colored narrow
bands, 1986 U2R, Six, Five, Four, Alpha, Beta, Eta, Gamma, Delta, 1986
U1R and the furthest out Epsilon which orbits at a distance of 51,140
km from the planets center.
date Uranus has 27 known moons:
Cordelia, Ophelia, Blanca, Cressida, Desdemona, Juliet,
Portia, Rosalind, Mab, Belinda, Perdita, Puck, Cupid, Miranda,
Francisco, Ariel, Umbriel, Titania, Oberon, Caliban, Stephano,
Trinculo, Sycorax, Margaret, Prospero, Setebos and Ferdinand.
 The Greek god of the sky is actually Ouranos, Uranus is
the Latinized version.
A planetary ring is a
flat disk shaped band composed of rock or ice
dust, larger rocks, boulders and ice chunks which circle in a planet's
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