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P_________
Definitions
That point of the orbit of a celestial body which is closest to the star around which the body is orbiting.
Word origin
From Ancient Greek περί (perí, “around”) + ἄστρον (ástron, “star”).
Source: Wiktionary, CC BY-SA 4.0
Used as a crossword answer0 curated clues
No curated clues for periastron yet.