apoapsis
/ˌæpoʊˈæpsɪs/
noun
- The point in an orbit where an object is farthest from the body it is orbiting.
- Engineers calculated the apoapsis to ensure the probe would not drift too far from Mars.
- The satellite reached its apoapsis and began its slow return toward Earth.
- At apoapsis, the spacecraft's speed is at its lowest in the orbit.
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