Size comparison: Pandora vs Venus

Comparison of the size of the fictional planet Pandora, present in Avatar and the real planet Venus.

These two planets have a similar size and weight. The respective surface gravities are quite close. Then the atmosphere is very different, Venus is a planet where life as found on Earth is not possible.

Object	Pandora	Venus
Type	Rocky planet	Rocky planet
Population	NA	0
Diameter	11,447 km	12,104 km
Mean radius	5,723 km	6,051 km
Mass	4.29 × 1024 kg	4.86 × 1024 kg
Surface gravity	7.8 m/s²	8.8 m/s²
Mean density	6.6 g/cm3	5.2 g/cm3
Circumference	35,958 km	38,019 km
Surface area	411 million km²	460 million km²
Volume	0.78 × 1012 km3	0.92 × 1012 km3
Surface pressure	91.2 kPa	9.2 MPa
Atmosphere composition	nitrogen, oxygen, 18% carbon dioxide, 5.5% xenon, >1% methane, >1% hydrogen sulfide	96.5% carbon dioxide, 3.5% nitrogen, 0.01% sulfur dioxide
Crust composition	silica, iron, unobtanium	silica, iron, nickel
Distance from the Milky Way center	-	27,200 light years

Note: if one of the objects is not visible, it just means that it is too tiny to be displayed compared to the other one.