Neptune is the eighth and farthest known planet from the Sun in the Solar System. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet.
Radius: 15,299 mi
Distance from Sun: 2.795 billion mi
Orbital period: 165 years
Length of day: 0d 16h 6m
Mass: 1.024 Ă— 10^26 kg (17.15 M)