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Rocky Planet#3 from the Sun
Earth
The Pale Blue Dot — Our Home
Earth is the only known planet to harbor life. Its liquid water oceans cover 71% of the surface, and its nitrogen-oxygen atmosphere is maintained by photosynthesis. A powerful magnetic field generated by its molten iron core shields the surface from deadly solar radiation. Earth's Moon stabilizes its axial tilt, creating the seasons that make complex life possible.
⚖
Mass
5.97 × 10²⁴
kg
◎
Diameter
12,742
km
↓
Gravity
9.81
m/s²
🌡
Temperature
15
°C avg
☀
Day Length
24
hours
⟳
Year Length
365.25
days
↔
Distance from Sun
149.6
M km
Atmosphere
78% N₂, 21% O₂, 1% Ar — life-sustaining
Moons(1)
The Moon
Diameter: 3,474 kmDiscovered: Prehistoric
Drifting away from Earth at 3.8 cm/year. Its gravity creates ocean tides and stabilizes Earth's axial tilt.