Arkon

Arkon was a planet that the Doctor tried to take Martha Jones to. The Doctor had visted this planet before. Despite this, they ended up on the planet Sunday instead.

Arkon was a prosperous, advanced Earth like world upon which technology had run riot.

Astronomy
Arkon orbited a hot F-type star.

Notable Places
(NSA: Wetworld)
 * The Robot Regent's Palace.
 * Tiffany's