different between apastron vs apoapsis

English

Etymology

From English apo- (prefix meaning ‘away from, separate’) + Ancient Greek ???????? (ástron, “fixed star”), modelled after aphelion. ??????? (Ástron) is derived from ?????? (ast?r, “celestial body (including a star, planet, meteor, etc.)”) (ultimately from Proto-Indo-European *h?eHs- (“to burn; to glow”)) + -?? (-on, suffix forming nominative, accusative and vocative singular nouns).

Pronunciation

• (Received Pronunciation) IPA^(key): /æ?pæst?(?)n/
• (General American) IPA^(key): /æ?pæst??n/, [?-]
• Hyphenation: ap?as?tron

Noun

apastron (plural apastrons or apastra)

1. (astronomy) The point of greatest separation between a celestial object and the star which it orbits.

   Antonym: periastron

Alternative forms

• apoastron

Hypernyms

• apoapsis

Coordinate terms

Translations

References

Further reading

• apsis on Wikipedia.Wikipedia

Anagrams

• Pastrano

English

Etymology

apo- +? apsis

Noun

apoapsis (plural apoapsides)

1. (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

Related terms

• apastron
• aphelion
• apoareion
• apocenter
• apocynthion
• apogalacticon
• apogee
• apohermion
• apojove
• apokrone, apokron
• apolune
• aponigricon
• aposaturnium
• aposelene

Translations

See also

• Apsis on Wikipedia.Wikipedia

Finnish

Pronunciation

• IPA^(key): /??po?psis/, [??po???ps?is?]
• Rhymes: -?psis
• Syllabification: a?po?ap?sis

Noun

apoapsis

1. (astronomy) apoapsis

Declension