28 ene 2009 año - Earth

Descripción:

Facts about Earth:
1. Earth only contains one moon that orbits around it.
2. Earth is classified as a Terrestrial Planet.
3. A day here on Earth is equal to 24 hours.
4. The period of revolution or a year here on Earth is 365.25 days.
5. • The average temperature of Earth is about 15 degrees Celsius.
• As of today, Earth is the only known astronomical object to harbor life.
• It is estimated that about 71% of Earth is made up of liquid and frozen water, leaving the other 29% for land.

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