The Magellanic Clouds were two dwarf galaxies, called the Larger Magellanic Cloud and Smaller Magellanic Cloud. They were in galactic orbit around Mutter's Spiral. (AUDIO: The Last Voyage)
The planet Harmony was located in one of the Magellanic Clouds. (PROSE: Planet of Bones)
The planet Logomundopsi was located in one of the Magellanic Cloud galaxies. (PROSE: The Devil Goblins from Neptune)
The Magellanic Clouds were less than three light-centuries from Ribos. (TV: The Ribos Operation)
Around 2570, the Sontarans were engaged in a conflict in the Magellanic Clouds. (PROSE: Love and War)
In the 28th century a Scarthian bandit named Brotak united most of the planets in the Magellanic system under his authority. After converting to Catholicism, he named himself Tsar of all the Magellanic Clouds and declared war with the Pope. (PROSE: Companion Piece)
The Larger Magellanic Cloud was the location of Eternity, one of the first human colonies outside of Mutter's Spiral. Eternity held its status as furthest of the "great colonies" for several centuries. (AUDIO: The Last Voyage)
A Dalek spacecraft was called "Megallanic Cloud Cruiser". (PROSE: The Dalek Book)
Bertie Potts gave River Song an invitation to a party on a spaceship with pick-up coordinates at a port in the Magellan Cloud. (AUDIO: The Boundless Sea)