• Atmosphere: A protective envelope dominated by nitrogen and oxygen.
  • Ocean System: One connected body of salt water covering 71% of Earth and regulating climate through heat and carbon circulation.
  • Continents: Moving plates continually reshape Earth's land.
  • Magnetic Field: Generated mainly by motion in Earth’s liquid outer core, this magnetic envelope deflects much of the solar wind and helps protect the atmosphere.
  • Iron Core: A solid inner core within a flowing liquid-metal outer core.
Charting EarthGenerating celestial model
3D celestial model — select a marker to explore⊕ Terrestrial planet
Observation guide

Find Earth in the sky

Deep dive

Our Ocean World

The third planet from the Sun and the only known world to support life.

Orbital motion

365.25 days

Field notes

Key features

  • Atmosphere
  • Ocean System
  • Continents