Neptune
Neptune is the eighth and farthest-known Solar planet from the Sun. In the Solar System, it is the fourth-largest planet by diameter, the third-most-massive planet, and the densest giant planet.
Neptune is denser and physically smaller than Uranus because itsgreater mass causes more gravitational compression of its atmosphere.
Neptune is not visible to the unaided eye and is the only planet in the Solar System found by mathematical prediction rather than by empirical observation.
Neptune Facts
- Equatorial Diameter: 49,528km
- Polar Diameter: 48,682 km
- Equatorial Circumference: 155,600 km
- Mass: 1.02 x 10^26 kg(17 Earth)
- Known Moons: 14
- Notable Moons: Triton
- Known Rings: 5
- Orbit Distance: 4,498,396,441 km (30,10 AU)
- Orbit Period: 60,190.03 Earth days (164.79 Earth years)
- Surface Temperature: -201°C
- First Record: September 23rd 1846
- Recorded By: Urbain Jean Joseph Le Verrier & Johann Calle