Periastron



[per-ee-as-truh n, -tron] /ˌpɛr iˈæs trən, -trɒn/

noun, plural periastra
[per-ee-as-truh] /ˌpɛr iˈæs trə/ (Show IPA). Astronomy.
1.
the point at which the stars of a binary system are closest (opposed to ).
/ˌpɛrɪˈæstrɒn/
noun
1.
(astronomy) the point in the orbit of a body around a star when it is nearest to the star, esp applied to double-star systems
periastron
(pěr’ē-ās’trən, -trŏn)
Plural periastra

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