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From Citizendium, the Citizens' Compendium

Contents 1 Parent topics 2 Subtopics 2.1 Natural satellites 2.2 Major artificial satellites 3 Other related topics

Parent topics

• Earth [r]: The third planet from the Sun in our solar system; the only place in the universe known by humanity to harbor life. [e]

Subtopics

• Satellite orbits [r]: Add brief definition or description

Natural satellites

• The Moon [r]: Earth's only natural satellite. [e]

Major artificial satellites

• International Space Station [r]: A space station currently in earth orbit assembled collaboratively by the space agencies of many nations. [e]
• Space Shuttle [r]: The spacecraft currently used by the United States government for its human spaceflight missions. [e]
• Hubble Space Telescope [r]: A telescope in orbit around the Earth that has made many important astronomical observations. [e]

Other related topics

• Space debris [r]: Man-made objects in earth orbit that no longer serve any useful purpose. [e]