periastron

n. [天]近星点

发音

/pɛɹɪˈæstɹən/

词形变化

periastra periastrons 复数 periastrons periastra 复数

释义与例句

n.
  1. 1.

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

    天文

词源

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

来源：wiktionary