At a Glance
Celestial Size Comparison
Choose the celestial objects you’re curious about. See at a glance how their sizes and environments compare.
Choose objects to compare
Choose at least 2 and no more than 4 celestial objects.
Solar System objects
16 objectsSunStar
MercuryPlanet
VenusPlanet
EarthPlanet
MoonMoon
MarsPlanet
CeresDwarf planet
JupiterPlanet
EuropaMoon
SaturnPlanet
EnceladusMoon
TitanMoon
UranusPlanet
NeptunePlanet
PlutoDwarf planet
67P/Churyumov–GerasimenkoComet
Size Comparison
Shows objects at a scale close to their actual size ratio.
Environment Comparison
Compare the size and environment of each celestial object.
| Measurement | Earth | 67P/Churyumov–Gerasimenko |
|---|---|---|
| Mean radius | ≈ 6,371 km | ≈ 1.7 km |
| Diameter | ≈ 12,742 km | ≈ 3.4 km |
| Spherical approximate volume | ≈ 1.083E12 km3 | — |
| Mass | ≈ 5.972E24 kg | ≈ 9.98E12 kg |
| Mean density | ≈ 5,513.4 kg/m³ | ≈ 533 kg/m³ |
| Surface gravity | ≈ 9.807 m/s² | — |
| Escape velocity | ≈ 11.2 km/s | — |
| Rotation period | ≈ 23.935 h | ≈ 12.4 h |
| Orbital period | ≈ 365.256 d | ≈ 2,350 d |
| Mean temperature | ≈ 288 K (14.9°C) | — |
| Surface pressure | ≈ 101,325 Pa | — |
| Orbital semi-major axis | ≈ 149,598,261.2 km | ≈ 518,000,000 km |
Mean radius
- Earth
- ≈ 6,371 km
- 67P/Churyumov–Gerasimenko
- ≈ 1.7 km
Diameter
- Earth
- ≈ 12,742 km
- 67P/Churyumov–Gerasimenko
- ≈ 3.4 km
Spherical approximate volume
- Earth
- ≈ 1.083E12 km3
- 67P/Churyumov–Gerasimenko
- —
Mass
- Earth
- ≈ 5.972E24 kg
- 67P/Churyumov–Gerasimenko
- ≈ 9.98E12 kg
Mean density
- Earth
- ≈ 5,513.4 kg/m³
- 67P/Churyumov–Gerasimenko
- ≈ 533 kg/m³
Surface gravity
- Earth
- ≈ 9.807 m/s²
- 67P/Churyumov–Gerasimenko
- —
Escape velocity
- Earth
- ≈ 11.2 km/s
- 67P/Churyumov–Gerasimenko
- —
Rotation period
- Earth
- ≈ 23.935 h
- 67P/Churyumov–Gerasimenko
- ≈ 12.4 h
Orbital period
- Earth
- ≈ 365.256 d
- 67P/Churyumov–Gerasimenko
- ≈ 2,350 d
Mean temperature
- Earth
- ≈ 288 K (14.9°C)
- 67P/Churyumov–Gerasimenko
- —
Surface pressure
- Earth
- ≈ 101,325 Pa
- 67P/Churyumov–Gerasimenko
- —
Orbital semi-major axis
- Earth
- ≈ 149,598,261.2 km
- 67P/Churyumov–Gerasimenko
- ≈ 518,000,000 km
This comparison is based on the most reliable observational data available. Celestial information may change with new research and observations, so please treat it as a general guide rather than a definitive source.