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| | Spacecraft - Wikipedia, the free encyclopedia (Site not responding. Last check: 2007-11-06) |
 | | Spacecraft are designed for a variety of missions which may include communications, earth observation, meteorology, navigation, planetary exploration, space tourism and space warfare. |
 | | Though not part of the spacecraft itself, the launch vehicle used to place a spacecraft in orbit, and the ground system used to send telecommands to the spacecraft and receive telemetry from the spacecraft, are frequently also considered subsystems. |
 | | A battery (or batteries) are typically connected to the bus via a battery charge regulator, and the battery is used to provide electrical power during periods when primary power is not available, for example when a Low Earth Orbit (LEO) spacecraft is eclipsed by the Earth. |
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