periastron

English dictionary entry

Meanings

noun

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

/pɛɹɪˈæstɹən/

periastron periastrons periastra

From Ancient Greek περί (perí, “around”) + ἄστρον (ástron, “star”).

apastron

periapsis

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