Planets · Planet
Earth
150 million km from the Sun · Light crosses it in 0.043 seconds
- Across
- 12,742 km
- Vs Earth
- 3.7× the Moon
- Mass
- 1 Earth
About
The only world we know that has liquid water on its surface, an oxygen atmosphere and life. Its magnetic field shields it from the solar wind, its large Moon steadies its tilt, and its plate tectonics keep recycling the crust.
The only known world with life — and liquid oceans on its surface.
At a glance
| Year | 365.25 days |
|---|---|
| Day | 23 hours 56 minutes |
| Surface | 71% water |
| Atmosphere | 78% nitrogen, 21% oxygen |
Did you know
- It is the densest planet in the Solar System.
- Its oxygen is biological: there would be almost none in the air without living things making it.
- Seen from Saturn, Earth is a single pale blue dot less than a pixel across.
Simulations
- Earth's magnetic shield — How Earth holds off the wind from the Sun, and what a solar storm does
Real photos
- Earthset over the Moon, photographed by the Artemis II crew, 6 April 2026 — NASA · source
- The Blue Marble: Earth from Apollo 17, December 1972 — NASA · source
- Earthrise over the Moon, from Apollo 8, December 1968 — NASA · source
- The Pale Blue Dot: Earth from 6 billion km by Voyager 1, 1990 (remastered) — NASA/JPL-Caltech · source