Definitions list
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nanosatelliteSatellite weighing only a few kilograms.
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natural satelliteCelestial body orbiting around a planet.
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nodePoint at which an orbit intersects the Earth’s equatorial plane. When a satellite crosses this point in a south-to-north direction, the node is said to be ascending, and when north-to-south, descending.
How orbital manoeuvres work
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nominalAccording to plan.
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non-synchronous / asynchronousBecause they are in motion relative to Earth, most man-made satellites are termed non-synchronous or asynchronous satellites. Conversely, geostationary satellites stay in an almost fixed position relative to Earth.
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nozzleConduit at the aft end of a booster in which combustion gas expands and accelerates to a high enough ejection velocity to propel the vehicle.