Neptune

Designation

Eighth planet from the Sun.

The farthest and coldest planet in the solar system, Neptune is known for its extremely high winds. Neptune is an “ice giant” like Uranus, with a thick atmosphere of hydrogen, helium, and methane that gradually transitions to a water and ammonia mantle around a small rocky core. It takes 165 Earth years to complete an orbit, and 16 Earth hours to complete a day.

Did you know: Chicago may be the windy city, but Neptune is the windy planet. Reaching a staggering 2000 km per hour, Neptune’s winds whip around the planet at supersonic speeds.

Diameter

49240.00km 30602.86mi

This object compared to other %category%

Average distance from the Sun

Semi-major axis (a)

Deviation from a circular orbit

Eccentricity (e)

Angle of orbit

Inclination (i)

Orbital elements

When will it be closest to the Sun?

days left

How far is it today?

From the Sun

1.00au

From the Earth