Atom accelerator
From Tardis Wiki, the free Doctor Who reference
An atom accelerator was a TARDIS component. In the Eleventh Doctor's TARDIS, it was a spiky ball on the navigation panel that spun while in flight and during take-off. According to the Eleventh Doctor, it steered the TARDIS. Henry Avery compared it to a wheel on his vessel, the Fancy. (TV: The Curse of the Black Spot) What is presumably an atom accelerator can also be seen on a table at the Torchwood Hub in the seventh episode of season one of Torchwood (TV series), (TV:Greeks Bearing Gifts)
