• General Information on Earth
  Not much is known about Earth.... just kidding! Learn more about our comfy home, the earth.

• Our Moon
  Learn about our moon, the only one in the solar system without a cool name.

• Eras of Earth's History
  Learn about the different eras in Earth's past.

• Save Earth!
  Learn how you can help save our planet.

AGE: At least 4.5 billion years old

SIZE: 7,926.41 miles (12,756.32 km)equatorial diameter

MASS: 6,600,000,000,000,000,000,000 short tons.

SURFACE AREA: 196,800,000 square miles (509,700,000 square km)

ATMOSPHERE COMPOSITION: Nitrogen (78%), oxygen (1%), argon (1%), with other gases making up the remainder.

CRUST COMPOSITION: Oxygen (46.6%), silicon (27.7%), aluminum (8.1%), iron (5%), calcium (3.6%), sodium (2.8%), potassium (2.6%), magnesium (2%), and other elements making up the remainder.

TEMPERATURE: Ranging from 136 degrees Fahrenheit (58 degrees Celsius) to -128.6 degrees Fahrenheit (-89.6 degrees Celsius). 57 degrees Fahrenheit (14 degrees Celsius) average

ONE DAY: 23 hours, 56 minutes, 4.09 seconds (We round this to 24 hours)

ONE YEAR: 365 days, 6 hours, 9 minutes, 9.54 seconds (We round this to 365 days)

NATURAL SATELLITES: 1

DISTINCTIVE FEATURE: (One of the) Only planet that supports life.