Traditional Culture Encyclopedia - Weather inquiry - A few years ago, the weather forecast used the earth.
A few years ago, the weather forecast used the earth.
The equatorial radius of the earth is 6378. 137km, the polar radius is 6356.752km, the average radius is about 637 1km, and the equatorial circumference is about 40076km. It is an irregular elliptical sphere with slightly flat equator and slightly protruding poles. The surface area of the earth is 5 1 100 million square kilometers, of which 7 1% is ocean and 29% is land. Seen from space, the earth looks blue.
There are core, mantle and shell structures inside the earth, and hydrosphere, atmosphere and magnetic field outside the earth. The earth is the only known celestial body with life in the universe at present, and it is the home of millions of creatures, including human beings. [ 1]?
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