Neptune
This gas giant is the most dense one of them all and is believed to have formed much closer to the Sun in early solar system history before migrating to its current position. The Great Dark Spot can be found here, which consists of anticyclonic storms with a tremendous speed of 2400 km/h.
Table of Facts
| Mass | 1.024 x 1026 kg |
| Orbit Period | 164.8 years (Sun) |
| Radius | 24622 km (0.035 *R☉) |
| Gravity | 11.15 m/s2 |
| Temperature | 72.15 *K (troposphere) |
| Moon(s) | Triton, Nereid, Despina, Thalassa & 10 others. |