Ribos

Ribos is a Grade 3 planet, home to the Ribosians and owned by the Magellanic Mining Conglomerate. It is located in the constellation of Scytha and is only 3 light-centuries from the Magellanic Clouds; though unknown to the Ribosians, they are also within the Greater Cyrrhenic Empire and are protected by the Alliance.

Ribos has an elliptical orbit around its sun and so has two seasons of extreme climates:Icetime and Suntime, each lasting approximately 32 Levithian years. Mineral traces on Ribos include cadmium, bismuth, and iron. A large predator known as the Shrivenzale is also native to this planet.

The major Ribosian city is Shur, though there are backwater settlements to the North. This city holds many important relics, such as the Ribosian crown jewels. Near the centres of the city is the Concourse, the pedestrian area. Underneath all this is the Catacombs, where the dead are stored and a colony of Shrivenzales live.

Garron and Unstoffe attempted to sell the entire planet to the Graff Vynda-K by leading him to believe that there was a 0.0001% find of Jethrik, the most valuble substance in the galaxy, on the planet. It was later visited by the Doctor, K-9 Mark II, and Romana I while in search of the Key to Time. (DW: The Ribos Operation)


 * Due to the need for technology to mine on Ribos, which would unsettle the Ribosians, Magellanic Mining could not mine until Ribos reached a Grade 2 planet status, which would take many thousands of years.