heart of gold - welcome on board
... Beneath it lay uncovered a huge starship, one hundred and fifty metres long, shaped like a sleek running shoe, perfectly white and mindboggingly beautiful. At the heart of it, unseen, lay a small gold box which carried within it the most brain-wretching device ever conceived, a device which made this starship unique in the history of the galaxy, a device after which the ship had been named - The Heart of Gold.

The Hitch Hiker's Guide to the Galaxy
By Douglas Adams (1952-2001)