The third largest planet (by diameter,) and fourth largest (by mass,) and the seventh from the sun in the solar system, Uranus is basically a large ball of hydrogen, methane, helium, and, to a lesser extent, ammonia (which gives it the bluish color). Uranus is pronounced your-anus by many, making it the butt (pun intended) of many jokes. Though many astronomers perfer to pronounce it yourunus.
Viewing Uranus in the sky through a telescope is basically looking at a blue ball with a black background.
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