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At a Glance

Celestial Size Comparison

Choose the celestial objects you’re curious about. See at a glance how their sizes and environments compare.

Earth12,742.017 km

Moon3,474.8 km

Measurement	Earth	Moon
Mean radius	≈ 6,371 km	≈ 1,737.4 km
Diameter	≈ 12,742 km	≈ 3,474.8 km
Spherical approximate volume	≈ 1.083E12 km3	≈ 21,967,875,613.3 km3
Mass	≈ 5.972E24 kg	≈ 7.346E22 kg
Mean density	≈ 5,513.4 kg/m³	≈ 3,344 kg/m³
Surface gravity	≈ 9.807 m/s²	≈ 1.62 m/s²
Escape velocity	≈ 11.2 km/s	≈ 2.4 km/s
Rotation period	≈ 23.935 h	≈ 655.72 h
Orbital period	≈ 365.256 d	≈ 27.322 d
Mean temperature	≈ 288 K (14.9°C)	≈ 220 K (-53.1°C)
Surface pressure	≈ 101,325 Pa	≈ 0 Pa
Orbital semi-major axis	≈ 149,598,261.2 km	≈ 384,400 km

Mean radius

Earth: ≈ 6,371 km
Moon: ≈ 1,737.4 km

Diameter

Earth: ≈ 12,742 km
Moon: ≈ 3,474.8 km

Spherical approximate volume

Earth: ≈ 1.083E12 km3
Moon: ≈ 21,967,875,613.3 km3

Mass

Earth: ≈ 5.972E24 kg
Moon: ≈ 7.346E22 kg

Mean density

Earth: ≈ 5,513.4 kg/m³
Moon: ≈ 3,344 kg/m³

Surface gravity

Earth: ≈ 9.807 m/s²
Moon: ≈ 1.62 m/s²

Escape velocity

Earth: ≈ 11.2 km/s
Moon: ≈ 2.4 km/s

Rotation period

Earth: ≈ 23.935 h
Moon: ≈ 655.72 h

Orbital period

Earth: ≈ 365.256 d
Moon: ≈ 27.322 d

Mean temperature

Earth: ≈ 288 K (14.9°C)
Moon: ≈ 220 K (-53.1°C)

Surface pressure

Earth: ≈ 101,325 Pa
Moon: ≈ 0 Pa

Orbital semi-major axis

Earth: ≈ 149,598,261.2 km
Moon: ≈ 384,400 km

Please Note

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.