How Large Is Earth? - Cool Cosmos - Caltech

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Earth

  • How did Earth get its name?
  • How much water does Earth have?
  • How thick is Earth's ozone layer?
  • What keeps our atmosphere attached to Earth?
  • What is the atmosphere of Earth made of?
  • What are the highest and lowest temperatures on Earth?
  • What is Earth's location in space?
  • How much does Earth weigh and how is this measured?
  • Why don't we feel Earth move?
  • Why does Earth spin?
  • What is Earth made of?
  • How large is Earth?
  • How old is Earth?
How large is Earth?

Earth's circumference (the distance all the way around the equator) is 24,901 miles (40,075 kilometers). Its diameter (the distance from one side to the other through Earth's center) is 7,926 miles (about 12,756 kilometers). Earth is slightly smaller when measured between the North and South Poles which gives a diameter of 7,907 miles (12,725 kilometers). Earth bulges out a bit more around the equator than around the poles because of its rotation (spin).

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