Uranus has been visited by only one spacecraft, Voyager 2 on Jan 24

Uranus' atmosphere is about 83% hydrogen, 15% helium and 2% methane

Uranus' blue color is the result of absorption of red light by methane in the upper atmosphere.

Voyager 2 discovered 10 small moons in addition to the 5 large ones already known. It is likely that there are several more tiny satellites within the rings.

Most of the planets spin on an axis nearly perpendicular to the plane of the ecliptic but Uranus' axis is almost parallel to the ecliptic. At the time of Voyager 2's passage, Uranus' south pole was pointed almost directly at the Sun. This results in the odd fact that Uranus' polar regions receive more energy input from the Sun than do its equatorial regions. Uranus is nevertheless hotter at its equator than at its poles. The mechanism underlying this is unknown

actually, there's an ongoing battle over which of Uranus' poles is its north pole! Either its axial inclination is a bit over 90 degrees and its rotation is direct, or it's a bit less than 90 degrees and the rotation is retrograde. The problem is that you need to draw a dividing line *somewhere*, because in a case like Venus there is little dispute that the rotation is indeed retrograde (not a direct rotation with an inclination of nearly 180).

Uranus is composed primarily of rock and various ices,

The seventh planet from the sun.

the third largest diameter in our solar system

his unique tilt makes Uranus appear to spin on its side, orbiting the sun like a rolling ball.

it is 1.7 biollon miles from the sun

Uranus dimeter is 31,518


Created with images by WikiImages - "uranus planet gas giant" • Royalty-free image collection - "Jupiter_Saturn_Uranus_Neptune" • myyorgda - "uranus / jupiter" • Melissa A. N. (Model) - "The Solar System Planets" • Image Editor - "01 The Solar System PIA10231, mod02" • Lunar and Planetary Institute - "Uranus and Earth" • Lunar and Planetary Institute - "Moons of Uranus and Earth" • Philippe Put - "solar system" • North Essex Astronomical Society - "uranus_041113ur10" • the very honest man - "Jupiter & Uranus"

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