Rocky · 3rd planet from the Sun
Earth
The only known planet with life — about 71% of its surface is covered in liquid water.
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Size & Distance
Diameter12,742 km
Vs. Earth's diameter1.00×
Distance from Sun1 AU (149.6M km)
Distance from Earth (range)0M – 299M km
Mass & Gravity
Mass vs. Earth1×
Surface gravity vs. Earth1×
Known moons1 (the Moon)
Time
Length of day24 hours
Length of year365.25 days (1 year)
Orbit
Orbital period365.25 days
Planet typeRocky
Interesting facts about Earth
- Earth is the only planet not named after a Greek or Roman god — its name comes from Old English and Germanic words simply meaning 'ground' or 'soil.'
- Earth's core is nearly as hot as the surface of the Sun, at roughly 5,400°C (9,800°F).
- Earth is the only known planet with plate tectonics — its crust is broken into moving plates that continuously reshape the surface over millions of years.
FAQ
How far is Earth from the Sun?
An average of about 1 AU (149.6 million km).
How big is Earth?
12,742 km in diameter — about 1.00× the diameter of Earth.
How much would I weigh on Earth?
Multiply your Earth weight by 1 — Earth's surface gravity is 1× Earth's. Try our weight calculator for an exact number.
Other planets
Explore more
Learn the Science: Read our complete educational breakdown on Earth & Magnetosphere.Historical Archive: Track past occurrences of this cosmic phenomenon.Live Telemetry: Jump to the real-time Kp index & solar wind command matrix.
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