Periapsis vs Apoapsis - What's the difference?

periapsis | apoapsis | Antonyms |

Apoapsis is an antonym of periapsis.

Periapsis is an antonym of apoapsis.


As nouns the difference between periapsis and apoapsis

is that periapsis is (astronomy) the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum while apoapsis is (astronomy) the point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.

periapsis

English

Noun

(periapsides)
  • (astronomy) The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its minimum.
  • Usage notes

    In the case of some particular celestial bodies, specialised terms are used.

    Antonyms

    * apoapsis

    Synonyms

    * pericenter

    See also

    * (Apsis)

    apoapsis

    English

    Noun

    (apoapsides)
  • (astronomy) The point of a body's elliptical orbit about the system's centre of mass where the distance between the body and the centre of mass is at its maximum.
  • Usage notes

    For some celestial bodies, specialised terms are used.

    Synonyms

    * apocenter

    Antonyms

    * periapsis

    See also

    * (Apsis)