Neptune is the fourth largest planet in the Solar System and 3.833 times larger than Earth.
- Equatorial radius 24,764 km (15,388 miles)
- Equatorial diameter of about 30,700 mi (49,400 km)
- Polar radius 24,341 (15.125 miles)
Distance from the sun is 4.5 billion km it is -216C and the length of a year is 164 years 2888.54 days. Also the length of a day is 16 hours and 3 minutes long.