periastron

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English[edit]

Etymology[edit]

From Ancient Greek περί (perí) "around" + ἄστρον (ástron) "star".

peri- +‎ astron

Pronunciation[edit]

  • IPA(key): /pɛrɪˈæstrən/

Noun[edit]

periastron (plural periastrons)

  1. (astronomy) That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.

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