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Placing an artificial satellite or space probe into orbit, commonly around a planet. On interplanetary missions, navigation and course corrections must occur to ensure that the spacecraft arrives at precisely the correct time and location for insertion into the orbit. When the planet's gravity bends the spacecraft's trajectory, the on-board command sequence manoeuvres the spacecraft into the correct attitude and fires a retrorocket to decelerate so that the planet pulls the craft into orbit. Later orbital adjustments can be made by orbit trim manoeuvres, which the Galileo probe used for two years around the planet Jupiter, and by aerobraking.

Subjects: Astronomy and Astrophysics.

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