Planet of the Solar System, eighth from the Sun and farthest known in the Solar System. Not visible to the naked eye. Seen as a small blue disk through a telescope or astronomy binoculars. Considered an “ice giant”, it is one of the outer planets.


Diameter: 27,700 miles (44,600 km)

Planet rotation time: 18.5 hrs

Distance from the Sun: 2,794,190,000 miles (4,496,600,000 km)

Revolution time around the Sun: 164.8 yrs

« Back to Glossary Index