A gravity well was the pull of gravity that a large body in space—such as a planet— exerted. Gravity wells could also be created artificially: thanks to a gravity well projector, it was possible to generate an "interdiction field" capable of disabling a starship's hyperspace maneuvers.
Centuries before the fall of the Galactic Republic, the technologically advanced Predori constructed starships able to withstand the crushing force of a gravity well. One such vessel, a prison ship christened Ashmead's Lock, managed to stay hidden within a gravity well until said well collapsed on itself.
The Millennium Falcon, piloted by Han Solo through the Kessel Run after escaping Kessel, was pursued by a summa-verminoth and nearly pulled into a gravity well located in the Maw Cluster, but escaped with the help of coaxium.
Rey surmised that, during the Battle of Jakku, the Imperial captains locked on to the nearby New Republic vessels with their warships' tractor beams and pulled them down into Jakku's gravity well, causing them to crash without visible battle damage.
- Rey's Survival Guide
- Star Wars: The Rebel Files
- Star Wars Encyclopedia of Starfighters and Other Vehicles
- Star Wars: Armada – Onager-class Star Destroyer Expansion Pack (Card: Cataclysm)
- "The Imperial Troops" – Star Wars Encyclopedia