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artificial satellite
subject			fact

artificial satellite	has attitude control
	has ground communication station
	can have orbit decay date
	has launch vehicle
	has launch location
	has launch date
	has definition a satellite made by humans which is gravitationaly bound and in orbit of a larger physical object
	is a kind of instrument
	is a kind of satellite
instrument	has operator
satellite	orbits a more massive physical object
	has approximately elliptical orbit
	has orbital period
	has orbital inclination
physical object	has location or center of gravity
	has angular momentum
	has mass
	has velocity
	has momentum
	has temperature
	has volume
	has extent
	has material
artifact	has creator
	has creation date
	has purpose
	has owner

Kinds of artificial satellite :

• active satellite
• communication satellite
• ESA satellite (2 kinds, 3 facts)
• geophysical satellite
• geosynchronous satellite (18 kinds, 70 facts) - an artificial satellite which orbits Earth every 24 hours
• inflatable spacecraft (3 kinds, 4 facts)
• Landsat satellite (1 kind, 2 facts)
• lunar spacecraft
• manned spacecraft (3 kinds, 6 facts)
• meteorological satellite (9 kinds, 24 facts)
• military spacecraft (14 kinds, 17 facts)
• NASA satellite (1 kind, 4 facts)
• NASDA satellite (6 kinds, 38 facts)
• navigation satellite (1 kind, 2 facts)
• recoverable spacecraft (1 kind, 3 facts) - a spacecraft which returns to Earth intact
• space telescope (14 kinds, 57 facts)
• Sputnik 1 (2 facts) - First artificial Earth satellite, launched by the Soviet Union on 4 October 1957. (lit.: companion)
• tethered satellite
• TIROS satellite
• unmanned spacecraft (3 facts) - an artificial satellite without a crew

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