Terrestrial Planet
Earth
Our home, Earth is the only place we know of so far that’s inhabited by living things. It's the only world in our solar system with liquid water on the surface.
Equatorial Diameter
12,756 km
Avg. Temperature
15°C
Mass
5.97219 × 1024 kilograms
Surface Gravity
9.807 m/s²
Rotation Period
23h 56m
Orbital Period
365.25 Days
Axial Tilt
23.4°
Moons
1
Planetary Structure & Atmosphere
Earth is composed of distinct chemical layers: a thin outer solid crust, a highly viscous mantle, a liquid outer core that generates the planet's magnetosphere, and a solid iron-nickel inner core. Its nitrogen-oxygen atmosphere protects life by absorbing ultraviolet solar radiation and warming the surface via greenhouse heat retention.
Atmospheric Composition
Cosmic Weight & Age Matrix
70 kg Human Weight
70.0 kg
1.0x Standard Earth Gravity
20 Earth Years Equivalent
20.0 Years
Earth Orbital Years (365.25 Days)
Escape Velocity
11.19 km/s
Standard Earth Baseline
Scientific Discoveries
- Earth is the densest of the eight planets in the Solar System and the largest of the four terrestrial planets.
- The planet's magnetic field is generated in the molten outer core, creating a protective magnetosphere that deflects harmful particles from the solar wind.
- Earth's axial tilt of 23.4° is responsible for producing seasonal variations in climate and weather across the planet during the course of a year.
- The Earth's rotation is gradually slowing, lengthening our day by 1.8 milliseconds per century.
- About 71% of the Earth's surface is covered by salt water oceans, and more than 80% of these oceans remain unexplored and unmapped.
- Earth is the only planet not named after a Greek or Roman god.