A trans-Earth injection (TEI) is a propulsion maneuver used to set a spacecraft on a trajectory which will intersect the Earth's sphere of influence, usually putting the spacecraft on a free return trajectory. The maneuver is performed by a rocket engine.
A trans-Earth injection (TEI) is a propulsion maneuver used to set a spacecraft on a trajectory which will intersect the Earth's sphere of influence, usually putting the spacecraft on a free return trajectory. The maneuver is performed by a rocket engine.
Source: Wikipedia "Trans-Earth injection" · CC BY-SA 4.0
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