(second outer-most solar system planet)
Uranus is the second outer-most planet in the solar system.
Among the solar system planets,
it is easily most similar to Neptune,
with a slightly larger radius and a slightly smaller mass.
Its moons include
Miranda, Ariel, Umbriel, Oberon, Titania.
It has a ring system, and within the solar system,
only Saturn's are more extensive and were discovered earlier.
The only mission to fly near Uranus was Voyager 2 in 1986.
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Referenced by pages:
equilibrium temperature (Teq)
Kuiper Airborne Observatory (KAO)
moment of inertia factor
supercritical fluid (SCF)