Astronomy
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The definition of a planet is a celestial body whose core is not hot enough to maintain nuclear fusion (otherwise it is a star). If it is in orbit around another plaent it is a satellite (or moon), not a planet. The planet you are most familiar with is [[Earth]]! A planet can have many features, such as [[Mars]] and [[Venus]], whose landscapes are magnificent! It also has many types of gases.
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The definition of a '''planet''' is a celestial body whose core is not hot enough to maintain [[nuclear fusion]] (otherwise it is a [[star]]). If it is in orbit around another planet it is a [[satellite]] (or moon), not a planet. The planet you are most familiar with is [[Earth]]! A planet can have many features, such as [[Mars]] and [[Venus]], whose landscapes are magnificent! It also has many types of gases.
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An [[Exoplanet]] is a planet outside the [[Solar System]].

Revision as of 18:08, 29 May 2009

The definition of a planet is a celestial body whose core is not hot enough to maintain nuclear fusion (otherwise it is a star). If it is in orbit around another planet it is a satellite (or moon), not a planet. The planet you are most familiar with is Earth! A planet can have many features, such as Mars and Venus, whose landscapes are magnificent! It also has many types of gases.

An Exoplanet is a planet outside the Solar System.