English Dictionary

periastron

IPA（発音記号）

/pɛɹɪˈæstɹən/

名詞

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

日本語の意味

天体が公転する中心の星に最も近づく軌道上の点（近日点）

The exoplanet's atmosphere heats up significantly at periastron as it swings closest to its star.

その系外惑星は近日点に達すると大気が著しく加熱される。

意味（1）

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

periastrons （ plural ）

periastra （ plural ）