This part or feature is not in the game, but could be added in a future update, version 1.8.
Some or all of the features on this page requires the Planets Expansion in-app purchase.
Neptune is one of the four gas giants in SFS. It might be added in SFS 1.8.
Overview[]
Neptune is the farthest gas giant from the Sun. Neptune has many moons including Triton and Nereid. Like all other gas giants, Neptune has a ring system, though it is not very large and is very dark. The planet's most striking feature is its light blue hue similar to that of Uranus, theorized to come from high levels of methane in the upper atmosphere.
Terrain[]
Since Neptune is an ice giant, it inevitably has no terrain. In addition to this, it also means you cannot land on it, and will sink into the core if attempted.
Atmosphere[]
The inside of Neptune. Purely theoretical.
Once added to the game, it is theorized that it will be 50 kilometers in height, similarly to Uranus. Although not very high in terms of height (assuming Venus’ is 40 kilometers), it’s accurate considering it’s smaller and less massive than the gas giants. Due to it containing methane, it will have a light blue tint compared to the other gas planets. Due to the atmosphere's density and thickness it can be assumed that reentry would be quite difficult, even with a heat shield.
Satellites[]
Neptune has 14 natural satellites, the largest of which is Triton. The following is a table describing all of these satellites.
| Moons of Jupiter |
| Moons of Saturn |
| Moons of Uranus |
| Moons of Neptune |
| Moons of Pluto |
Triton's surface as seen by Voyager 2 in true color.
Natural Satellites[]
| Name | Roman Numeral | Diameter | Gravity | Escape Velocity | Orbital Period | Date of Discovery |
|---|---|---|---|---|---|---|
| Neptune | - | ~49,244 km | 11.15 m/s2 | 23.5 km/s | 165 earth years | September 23, 1846 |
| Trition | I | 2705.2±4.8 | 0.779 m/s2 | 1.455 km/s | 5.8769 days | October 10, 1846 |
| Nereid | II | 357 ± 13 km | ? | ? | 360.14 days | May 1, 1949 |
| Naiad | III | 60.4 km | ? | ? | 0.29544 days | September 1989 |
| Thalassa | IV | 81.4 km | ? | ? | 0.135 days | September 1989 |
| Despina | V | 156 km | ~0.026 m/s2 | ~0.063 km/s | 0.3346 days | September 1989 |
| Galatea | VI | 174.8 km | ~0.018 m/s2 | ~0.056 km/s | 0.2487 days | September 1989 |
| Larissa | VII | 194 km | ~0.03 m/s2 | ~0.076 km/s | 0.556 days | May 24, 1981 |
| Proteus | VIII | 420 km | 0.07 m/s2 | 0.17 km/s | 1.1223 days | September 1989 |
| Halimede | IX | 62 km | ? | ? | 5.14 earth years | August 14, 2002 |
| Psamathe | X | 40 km | ? | ? | 25.06 earth years | August 19, 2003 |
| Sao | XI | 44 km | ? | ? | 7.9 earth years | August 14, 2002 |
| Laomedeia | XII | 42 km | ? | ? | 8.7 earth years | February 3, 2002 |
| Neso | XIII | 60 km | ? | ? | 26.8 earth years | August 14, 2002 |
| Hippocamp | XIV | 34.8±4.0 | ? | ? | 0.95 days | July 1, 2013 |
What to do on Neptune?[]
Many things can be done on Neptune and its moons.
Gravity Assist[]
Neptune has a reasonably high gravity (and hill sphere), making the planet helpful for reaching distant Kuiper Belt Objects, or going interstellar.
Orbital Probes[]
Probes can be placed in orbit around Neptune and Triton, but orbit insertion around the small irregular ones may be challenging or downright dangerous.
Atmospheric Probes[]
Atmospheric probes could be sent in to study Neptune's atmosphere, but they would require intense thermal and pressure shielding to withstand the intense conditions within the thick atmosphere. Inspired by the Galileo Atmospheric probe.
Grand Tours[]
A grand tour of the solar system is possible with Neptune.
Much More![]
Neptune has endless possibility for exploration, everything from sample return missions to space stations and surface bases on moons are all possible, but only with lots of delta-v and perseverance.
Gallery[]
Trivia[]
- Neptune's moon Neso has the longest orbital period of any moon in the solar system; having and orbital period of nearly 26 earth years.
- Neptune is the smallest gas giant.
- Neptune was the only planet discovered using math.
- Neptune has rings, though they are very faint.
| Free | Planets DLC Required | Unimplemented | ||
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Sun • Mercury • Venus • Earth • Mars | Jupiter | Saturn • Uranus • Neptune | |
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Mercury | |||
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Venus | |||
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Earth • Moon (Luna) • Captured Asteroid | |||
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Mars • Deimos • Phobos | |||
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Jupiter • Io • Europa • Ganymede • Callisto | |||
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Saturn Titan | |||
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Uranus • Miranda • Ariel • Umbriel • Titania • Oberon | |||
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Neptune • Triton | |||
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Ceres • Pluto | |||