Planet
Earth
Terrestrial planet
Our home — the only known world with life
The densest planet and the only one known to host liquid surface oceans and life. Earth's magnetic field and atmosphere shield the surface from solar wind and radiation.
Key facts
Distance
1.00 AU from the Sun (by definition, ~149.6 million km)
Diameter
12,742 km
Orbital period
365.25 days
Axial tilt
23.44°
Moons
1
Did you know
- About 71% of the surface is covered by water.
- Its axial tilt causes the seasons.
- Earth is about 4.54 billion years old.
