English Dictionary

gravitational keyhole

noun

(astronomy) A tiny region of space where a planet's gravity would alter the orbit of a passing asteroid such that the asteroid would collide with that planet on a given future orbital pass.

The gravitational keyhole is a region in space where the gravitational pull of a celestial body can alter the trajectory of another object.

意味（1）

(astronomy) A tiny region of space where a planet's gravity would alter the orbit of a passing asteroid such that the asteroid would collide with that planet on a given future orbital pass.