The Sun
2003 UB313
Earth - Third rock from the Sun
Earth and Moon Image
Courtesy NASA/JPL-Caltech
Earth is the only planet in the entire universe that is known to support life naturally, and Earth is the only planet that we know of that contains all of the building blocks necessary to support it's wide variety of carbon based life forms which include Humans. Other planets in other galaxies come close, but we will have no way of knowing for sure until we can get closer to them.

Our atmosphere is 78% nitrogen, 21% oxygen, and 1% other miscellaneous particles.

The earth is covered by water, and only 30% of the surface is made up of land masses such as the U.S.A. It was long believed that the continents of earth were stationary, but we now know that all land areas on earth are moving slowly but surely. This effect is called plate tectonics. Plate tectonics is responsible for the hight of mountains created by these large plates coming together, and large trenches created under the oceans where they are pulling apart.

We are constantly struggling to understand our environment, and the changes to it that affect life as we know it. Our push into space this century will greatly expand our knowledge of our own planet and the planets around us.

Discuss Earth in our forums: Earth


Earth Statistics Table:
    Things to keep in mind:
  • 1 A.U. is the distance from the Earth to the Sun, or 93 million miles ( 149.6 million km )
  • Planets have elliptical orbits, and distances given are the average distance from the sun.
  • Measurements given in earth terms. If read "days" or "years," earth days and earth years are implied
Date of Discovery Known by the Ancients
Average Distance from the Sun 149,597,890 km
92,955,820 miles
Equatorial Radius 6,378.14 km
3,963.19 miles
Equatorial Circumference 40,075 km
24,901 miles
Density 5.515 g/cm3
Surface Area 510,065,700 km2
196,937,500 mi2
Gravity 9.766 m/s2
32.041 ft/s2
Rotation Period (Length of Day) 0.99726968 days
23.934 hours
Orbit Period (Length of Year) 1.0000174 years
365.24 days
Orbital Velocity (avg) 107,229 km/h
66,629 mph
Orbital Circumference 924,375,700 km
574,380,400 miles
Min/Max Surface Temperature -88/58 C
-126/136 F
185/331 K

Article written by IceCreamTruck and was compiled after extensive reading and study. This article is formatted to include information that isn't obvious from looking at most facts and figures sheets. Exact figures about the planet courtesy of JPL NASA and have been shortened to include only the most useful information. Please visit NASA's website for further detailed information on this planet NASA Earth Pages

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