Moon and Styx
Moon (Earth’s natural satellite) and Styx (moon of Pluto) side by side – to scale and in numbers.
| Moon | Styx | Moon ÷ Styx | |
|---|---|---|---|
| Diameter | 3,475 km | 10.4 km | 3.34 × 10² × |
| Mass | 7.30 × 10²² kg | – | |
| Surface gravity | 1.60 m/s² | – | |
| Density | 3,340 kg/m³ | – | |
| Mean temperature | -20 °C | – | |
| Mean distance from the Sun | 149.6 million km with Earth |
5.91 billion km with Pluto |
0.03 × |
| Length of day | 29.5 days sunrise to sunrise |
– | |
| Year (orbit around the Sun) | 365.2 days (1.00 years) with Earth |
247.9 years with Pluto |
4.03 × 10⁻³ × |
| Orbit around its planet | 27.3 days around Earth |
20.2 days around Pluto |
1.36 × |
Data: NASA Planetary Fact Sheet, JPL SSD (planetary moons), JPL SBDB (dwarf planets) – public domain. Moon gravity is calculated from the JPL mass (GM) and radius; a moon’s “year” is its planet’s orbit around the Sun. A dash – no value in these sources.
⇄ Swap sides More about Moon More about Styx