Facts about Neptune
1.
Neptune has only been passed by one spacecraft, Voyager 2 which flew by on the
25th of August 1989.
2.
Although smaller in diameter than Uranus, Neptune has a greater mass.
3. Neptune’s surface gravity is almost Earth like.
4. Neptune has the strongest winds in the Solar System.
5. Neptune is the coldest planet in the Solar System.
7. Neptune’s moon Triton is even colder.
Planet Profile
1. Circumference at Equator:155,600 km
2. Diameter: 49,493 km
3. Mass: 102,410,000,000,000,000 billion kg (17.15x Earth)
4. Average Distance from Sun: 4,498,396,441 km (30.10 AU)
5. Known Satellites: 14
6. Notable Satellites: Tritan
7. Length of Orbit: 60,190.03 Earth days (164.79 Earth years)
Description
Neptune is the eighth planet from
the Sun and the smallest of the gas giants. Neptune was the first planet
found
by mathematical prediction after unexpected changes in the orbit of Uranus were
observed. Neptune is named after the Roman god of the sea.
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