Retrorocket

Retrorockets, also known as retro thrusters, were a type of rocket on starships which could be used in atmosphere, and were found on ships such as the Tribunal, Millennium Falcon, and Razor Crest. In 19 BBY, the Venator-class Star Destroyer Tribunal, en route from Mandalore to Coruscant, was thrown into turmoil as a result of the execution of Order 66. During the fighting, the ship fell out of hyperspace when a former prisoner on board, the renegade Sith Lord Maul, destroyed its hyperdrive, sending the Star Destroyer onto a collision course with a nearby moon. As the stricken vessel entered the moon's atmosphere, a bridge officer called for the retrorockets to be fired, but was told that they had lost lateral control just before the bridge exploded.

Text and facts from the “Retrorocket” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.