The Blue Planet
Earth
Earth is the third planet from the Sun and the only world known to support life. Its surface contains oceans, continents, forests, deserts, mountains and frozen polar regions.
Liquid water covers most of Earth's surface, while its atmosphere helps protect and regulate life.
Diameter
12,742 km
Day length
23h 56m
Year length
365.25 days
Moons
1
Unique feature
A Living World
Earth is the only known planet with stable surface oceans and a living biosphere.
Natural satellite
The Moon
Earth's Moon helps stabilize the planet's axial tilt and drives most ocean tides. It is also the only world beyond Earth that humans have visited.
Distance from Sun
About 149.6 million km
Surface water
About 71%
Gravity
9.81 m/s²
Atmosphere
Nitrogen and oxygen