Earth
NASA Apollo 17
Terrestrial planet

Earth

Only known world with surface oceans and life.

Object typeTerrestrial planet
Diameter12,742 km
Mass1 Earth mass
Gravity9.8 m/s²
Average temperatureAbout 15°C
Distance from the Sun149.6 million km
Orbital period365.25 days
Rotation period23.9 hours
Number of moons1
AtmosphereNitrogen, oxygen, argon, trace gases
DiscoveryHome world

Interesting Facts

  • Only known world with surface oceans and life.
  • Its magnetic field helps shield the atmosphere.

Major Missions

  • Landsat
  • Terra
  • Aqua
  • GOES