TARDIS were not, its weight would shatter the Earth's surface. In the tie-in novels, the interior of the TARDIS has been known to contain an entire city, encompass an entire parallel Earth, and even dwarf Gallifrey itself when turned inside out. A distinctive architectural feature of the TARDIS interior is the roundel. In the context of the TARDIS, a roundel is a circular decoration that adorns the walls of the rooms and corridors of the TARDIS, including the console room. Some roundels conceal TARDIS circuitry and devices, as seen in the serials "The Wheel in Space" (1968), "Logopolis", "Castrovalva" (1981), "Arc
Royal Air Force roundels in the nuclear strike role had a pale pink and blue flash, the same shades as the roundels, to reflect some of the thermal radiation from a nuclear explosion. The Royal Navy and Army do not use the fin flash but have the words "ROYAL NAVY" or "ARMY" on the rear fuselage or fin instead. An exception to this was the Harrier GR7s and GR9s of the Naval Strike Wing, which carried similar markings to RAF Harriers. The fin flash can be rectangular, slanted or tapered, depending on aircraft type. In a situation similar to that of the roundels, the