Planet
Neptune ♆
The outermost planet, found in 1846 by mathematics before anyone saw it. It needs binoculars or a telescope, and its strongest winds reach 2,000 km/h.
| Diameter | 49,244 km |
|---|---|
| Mean distance from the Sun | 30.070 AU (4,498 mln km) |
| Rotation period | 16.11 h |
| Orbital period | 164.8 year |
| Known moons (2025) | 16 |
| Symbol | ♆ Astronomical symbols |
| Naked-eye visible | No |