different between apastron vs aphelion

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

Greek form of Latin aphelium, from Ancient Greek ??? (apó, “from”) + ????? (h?lios, “sun”) (modelled after apogaeum). Compare perihelion.

Pronunciation

• IPA^(key): /??fi?l??n/, /æp?hi?l??n/

Noun

aphelion (plural aphelia or (deprecated) aphelions)

1. (astronomy) The point in the elliptical orbit of a planet, comet, etc., where it is farthest from the Sun.

Antonyms

• perihelion

Related terms

• see apoapsis

Translations

Anagrams

• Ophelian