Uranus

The seventh planet from the Sun, Uranus is the third largest of the planets and is circled by eleven rings and fifteen known moons. Nine of Uranus's rings are less than six miles wide making them extremely narrow and hard to detect.  This is especially true when compared to Saturn's bright rings, most of which  are thousands of miles wide. Like its neighboring planet, Neptune, Uranus has distance blue coloration cuased by methane in its atmosphere. However, Uranus is very different from every other planet in a special way.  Astronomers suspect that Uranus must have collided with another big planet soon after the formation of the solar system, because it is the only planet that is toppled over and rolls on its side around the Sun. In other words, its equator runs from the top to the bottom o the planet.
Did you know? Temperatures on Uranus
Did you know? Temperatures on Uranus stay around -350ºF, which means that if you uncovered your hand while you were there, it would be instantly treeze dried!
Uranus Statistics
Discovered byWilliam Herschel
Date of discovery1781
Mass (kg)8.686e+25
Mass (Earth = 1)1.4535e+01
Equatorial radius (km)25,559
Equatorial radius (Earth = 1)4.0074
Mean density (gm/cm^3)1.29
Mean distance from the Sun (km)2,870,990,000
Mean distance from the Sun (Earth = 1)19.1914
Rotational period (hours)-17.9
Orbital period (years)84.01
Mean orbital velocity (km/sec)6.81
Orbital eccentricity0.0461
Tilt of axis (degrees)97.86
Orbital inclination (degrees)0.774
Equatorial surface gravity (m/sec^2)7.77
Equatorial escape velocity (km/sec)21.30
Visual geometric albedo0.51
Magnitude (Vo)5.52
Mean cloud temperature-193°C
Atmospheric pressure (bars)1.2
Atmospheric composition
Hydrogen
Helium
Methane

83%
15%
2%


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