Gravity well (racing)

In relative physics, the seemingly straight lines of space and time are curved by gravity. When drawn as a 2D plain curving down into a third dimension, the curve appears to form a sort of "dent" or "well" in space-time. The edge of the gravity well is sometimes known as an event-horizon. Gravity wells are of great concern to hyperspace navigation since they cast a sort of "shadow" into hyperspace.