| Earth | Moon | Mercury | Mars | Ganymede |
---|---|---|---|---|---|
Planetary radius (km) | 6371a | 1737b | 2439c | 3389d,e | 2632f |
Surface gravity (m s−2) | 9.8a | 1.6a | 3.7a | 3.7a | 1.4a |
Core radius (km) | 2890a | 250–430b | 1965–2050g,h | 1370–1870d,e | 650–880f |
R c /R p | 0.45a | 0.14–0.25b | 0.8–0.84g,h | 0.4–0.55d,e | 0.25–0.33f |
P cm (GPa) | 139a | 4.5–5i | 2.8–3.3h | 20–25d,e | 5.5–7f |
P c (GPa) | 357a | 5–6i | 33–37h | 38–42d,e | 9.5–11f |
Gravity at CMB (m s−2) | 10.3a | 0.7b | 4h | 3d,e | 1.3f |