Definition, Meaning & Synonyms

apoapsis

noun
ˌæp.oʊˈæp.sɪs
Definition
The point in an orbit that is farthest from the body being orbited.
Examples
  • In a satellite’s orbit, the apoapsis is the point where it is farthest from the Earth.
  • The spacecraft reached its apoapsis before beginning its descent back to the planet.
  • During the mission, scientists calculated the apoapsis to optimize fuel usage.
Meaning
In orbital mechanics, apoapsis refers to the maximum distance between an orbiting body and the central body it orbits around, such as a planet or star.
Synonyms
  • aphelion (in relation to the Sun)
  • apogee (in relation to Earth)