Isop Galaxy

The Isop Galaxy was a galaxy many light years away from Mutter's Spiral. (TV: The Web Planet)

Features
The Silver Devastation was an area of space in the Isop Galaxy, (PROSE: The Game of Death) formed in 350 million BC when the Isop and Grem galaxies collided. (PROSE: Time Traveller's Diary) According to Mr Smith, Raxacoricofallapatorius was located in the Isop Galaxy. (TV: SJAF 4) The Rhumos system was also located there. Rhumon Prime and New Rhumos were both located in the system. (PROSE: Twilight of the Gods)

Vortis was briefly moved from the Isop Galaxy to Mutter's Spiral by the Zarbi Supremo. (PROSE: The Lair of Zarbi Supremo)

The Tenth Doctor mentioned the perfect robot hosts as living on Napir Prime, a fact he had read in The Rough Guide to the Isop Galaxy. (PROSE: Shining Darkness)

Natives
By the year 200,100, its oldest being was the Face of Boe. (TV: Bad Wolf) Another species native to the galaxy were the Banjunx. (COMIC: Hyperstar Rising) Though it did not necessarily originate there, the Animus lived in the Isop Galaxy for a time. (TV: The Web Planet, PROSE: Twilight of the Gods)

Behind the scenes

 * Doctor Who: The Time Traveller's Almanac states Clom is located here. As Clom is stated in Love & Monsters to be the twin planet of Raxacoricofallapatorius, it would logically follow that this planet is located in the same galaxy. World War Three, however, has the Ninth Doctor insinuate that Raxacoricofallapatorius is one of 5,000 planets within travelling distance of Earth, implying it's in the same galaxy. This could be explained by assuming that Clom was already moved once prior to The Stolen Earth since it is possible for twin planets to be moved away from each other, as seen with Mondas in The Tenth Planet.