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Media Type Image

Source NASA APOD

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Discover the planets, moons, and celestial bodies in our cosmic neighborhood

Earth

Earth is the third planet from the Sun and the only astronomical object known to harbor life. About 29% of Earth's surface is land consisting of continents and islands. The remaining 71% is covered with water, mostly by oceans, seas, gulfs, and other salt-water bodies, but also by lakes, rivers, and other fresh water, which together constitute the hydrosphere.

Semimajor Axis

149.6M km

Mean Radius

6,371 km

Mass

5.97 × 10²⁴ kg

Density

5.51 g/cm³

Orbital Period

365.25 days

Rotation Period

24 hours

Moons

1

Gravity

9.8 m/s²

Discovery Info

Discovered By Known since antiquity

Discovery Date Ancient

Body Type Planet

Volume N/A

Quick Facts

Only known planet with liquid water
Atmosphere contains 78% nitrogen
Magnetic field protects from solar wind
Formed 4.54 billion years ago

Orbital Characteristics

Perihelion 147.1M km

Aphelion 152.1M km

Eccentricity 0.0167

Inclination 0.00°

Axial Tilt 23.44°

Avg Temperature 15°C

Escape Velocity 11.2 km/s

Planet Comparison

Planet	Distance (AU)	Diameter (km)	Mass (Earth=1)	Orbital Period	Moons	Type