Topic summary
Gravity well
Extracted from the Wikipedia article Sphere of influence (astrodynamics).
Gravity well
A gravity well (or funnel) is a metaphorical concept for a gravitational field of a mass, with the field being curved in a funnel-shaped well around the mass, illustrating the steep gravitational potential and its energy that needs to be accounted for in order to escape or enter the main part of a sphere of influence.