重じゅう力りょく井い戸ど

noun

gravity well

Technical term in astronomy and physics, referring to the gravitational potential field around a massive body. Often used in contexts like planetary science or space travel.

• 地ち球きゅうの重じゅう力りょく井い戸どから脱だっ出しゅつするには、大おおきな速そく度どが必ひつ要ようだ。

  To escape Earth's gravity well, a high velocity is required.

• この惑わく星せいの重じゅう力りょく井い戸どは深ふかく、探たん査さ機きの着ちゃく陸りくが難むずかしい。

  This planet's gravity well is deep, making landing a probe difficult.