The Sphere
From Tardis Wiki, the free Doctor Who reference
A Void Ship is a spacecraft designed to explore the Void that exists between dimensions. It appears as a solid gold sphere with no lines until it is open, in which its sides fold down to reveal the occupants. There is no sign that the ship can touch ground.
When travelling through the Void, it is removed from time and space and until activated, it has no mass, heat or radiation that allows the ship to be detected except that it is visible. An invisible barrier prevents anything from touching the ship.
It was thought impossible, but does exist, the only one being a Void Ship used by the Daleks of the Cult of Skaro to escape the Time War with the Genesis Ark. It is unknown if they built it themselves or not. (DW: Army of Ghosts / Doomsday)
