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Meaning of gravitational keyhole | Babel Free

Noun CEFR B2

Definitions

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.

CEFR level

B2
Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.
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See also

gravitational lens gravitational lensing gravitational mass gravitational mirage gravitational propulsion gravitational radiation

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