Periastron is a antonym of apastron.
In astronomy terms the difference between apastron and periastron
is that apastron is the point of greatest separation between two stars, especially in a binary star situation while periastron is that point of the orbit of a celestial body which is closest to the star around which the body is orbiting.
apastron
English
Noun
(
en noun)
(astronomy) The point of greatest separation between two stars, especially in a binary star situation.
Antonyms
* periastron
Related terms
* apocenter
* apoapsis
* aphelion
* apolune
* apogee
References
periastron
English
Noun
(
en noun)
(astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.
Antonyms
* apastron
Related terms
* periapsis
* pericenter
* pericynthion
* pericytherion
* perigalacticon
* perigee
* perihelion
* perijove
* perikron
* perilune
* perimelasma
* perinigricon
* periposeidon
* perisaturnium
* periselene
Anagrams
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