Neptune
Mass = 17
Earths, Radius = 3.9 Earths, density = 1.76 x water
Distance: 30
AU; Orbital Period: 163 years; Rotation period: 16.1 hours.
Voyager
showed it is more like Jupiter than
Uranus in appearance. Recently, we have developed the ability to see its storms from Earth, using “adaptive optics” in infrared.