Apsis
Pronunciation: /ˈæsɪs/
Apsis (noun)
- A point in an orbit where a moving body is farthest from or closest to the object it circles.
- The point in an orbit where the orbiting object is nearest to the central body.
- The point in an orbit where the orbiting object is farthest from the central body.
Examples
- The spacecraft reached an apsis where its path turned.
- At the apsis, the orbit changes direction smoothly.