Mutter's Spiral

Mutter's Spiral was the Time Lord designation for the galaxy in which Earth's solar system was located. (TV: The Deadly Assassin, The Invasion of Time) Gallifrey was located in the same galaxy as the Earth. (TV: Doctor Who, PROSE: The Devil Goblins from Neptune)

Naming
Mutter's Spiral was named after Stellion Mutter. (PROSE: The Taking of Planet 5)

Humans knew Mutter's Spiral as the Milky Way or as Adric referred to it, Galaxia Kyklos. (TV: Four to Doomsday) By the time of Sabalom Glitz, it also went by the name of the Stellian Galaxy. (TV: The Mysterious Planet) At least one Gallifrey-based robot — K9 Mark II — recognised the galaxy both by the name "the Milky Way" and by "Mutter's Spiral". (WC: Shada) During the War in Heaven, it was also known as Mutter's Cluster. (PROSE: The Taking of Planet 5) According to the Aubertides, Mutter's Spiral was in the Stellarian Galaxy, with Gallifrey near the galaxy's core. (PROSE: Human Nature) Castellan Spandrell informed President Romana of a Fortean Flicker across the Stellarian Galaxy. It was traced to the planet Hogsumm. (PROSE: The Highest Science, Happy Endings)

Size
Mutter's Spiral was approximately one hundred thousand light-years in diameter. (PROSE: Doctor Who and the Invasion from Space, The Eyeless)

Gat of Gallifrey considered Mutter's Spiral to be a "tiny" galaxy. (TV: Fugitive of the Judoon)

Neighbours
Mutter's Spiral's nearest significant neighbouring galaxy was the Andromeda Galaxy. It was also surrounded by several nearby minor satellite galaxies, including Galaxy Seven (PROSE: The Eyeless) and the two dwarf galaxies the Larger Magallenic Cloud and Smaller Magallenic Cloud. (AUDIO: The Last Voyage)

The space whale known as "Cash Cow" hailed from a separate galaxy. (TV: Meat)

Mutter's Spiral was part of the Five Galaxies, (PROSE: Borrowed Time, TV: Delta and the Bannermen) and the Ten Galaxies, which the Dominators claimed to master. (PROSE: Mutually Assured Domination)

The Dagmar Cluster was "two and half galaxies" away from Mutter's Spiral. (TV: The Girl in the Fireplace)

Mutter's Spiral was located millions of light-years away from the Ninth Galactic System and the constellation of Miros, (TV: Mission to the Unknown) and "half a universe" away from the Torajii system. (TV: 42)

Locations
According to the Tenth Doctor, Mutter's Spiral contained about 50 billion planets. (PROSE: The Last Dodo)

Mutter's Spiral contained Earth's solar system, (TV: The Deadly Assassin) Earth itself was located at galactic coordinates 58044 684884 (TV: The Pirate Planet) in Sector 8023 of the Third Quadrant. (TV: Logopolis)

Gallifrey was also located in Mutter's Spiral, (TV: Doctor Who, PROSE: The Devil Goblins from Neptune) in the Kasterberous system. (PROSE: Prisoners of the Sun) While most accounts placed Gallifrey at the centre of its galaxy, (PROSE: The Devil Goblins from Neptune, Interference - Book Two, Human Nature) or as near as possible without succumbing to a black hole, (PROSE: Interference - Book One) with 30,000 light-years between Gallifrey and the planet Earth, (PROSE: The Devil Goblins from Neptune) the Eighth Doctor mentioned that it was on "the other side of [the] galaxy" from Earth, 250 million light-years away. (TV: Doctor Who)

Also found within the galaxy were Draconia and the Ogron planet, the latter being located in what was believed to be an uninhabited sector until the 26th century, (TV: Frontier in Space) on the outer extremity of the galaxy (PROSE: The Romance of Crime) at galactic coordinates 0110011 by C2 (PROSE: Interference - Book One) or at 2349 to 6784. (TV: Frontier in Space)

According to the Doctor, the Sontarans of Sontar were native to Mutter's Spiral. (TV: The Two Doctors, The Sontaran Stratagem) Another account placed Sontar in the Metasaran Galaxy. (TV: The Last Sontaran)

The planet Mogar was located on the Perseus arm of the galaxy. (TV: Terror of the Vervoids)

According to Matron Cofelia, the Adipose resided "far across the galaxy" from Earth. (TV: Partners in Crime)

According to the Tenth Doctor, Hydropellica Hydroxi, the planet which the Gappa came from, was on the far side of the Milky Way. (PROSE: Snowglobe 7)

History
The Doctor frequented Earth, a planet in Mutter's Spiral. (TV: An Unearthly Child, et al.) On one occasion, Earth was moved out of the galaxy to the Medusa Cascade by the Daleks. (TV: The Stolen Earth)

As the Sixth Doctor noted to Peri Brown, the long-standing war between the Sontarans and the Rutan Host was waged across the galaxy. (TV: The Two Doctors)

The Dark Empire was a period of tyrannical galactic rule by a mysterious and reportedly immortal entity called Horath, who crushed the civilisations of all but the most primitive planets. Horath was ultimately defeated circa 1000 BC, but could not be killed, so his body and his consciousness were divided and they were hidden at opposite ends of the galaxy. (TV: Enemy of the Bane)

As recalled by Leef Apple Glyn Slitheen-Blathereen, while some Slitheen faced justice on Raxacoricofallapatorius, others fled to the farthest reaches of the galaxy. During an ultimately failed attempt to use a matter compressor to turn Earth's carbon atmosphere into a diamond, a Slitheen predicted that this would make the Slitheen the richest family in the galaxy. (TV: The Gift)

The Uvodni homeworld was located in the Spiral Cluster of the Dragon Nebula, thirty four thousand light years "across the galaxy" from Earth. The Uvodni were part of a planetary alliance that fought the Malakh in the Ghost Wars of the Horsehead Nebula, which was ended with an armistice by 1998. (TV: Warriors of Kudlak)

In 2009, Commander Kaagh acquired the consciousness of Horath in the Kaldeann Cluster on behalf of the Bane Kindred; by reuniting it with Horath, it would have allowed them to take over the galaxy. However, Kaagh joined forces with Mrs Wormwood, a rogue Bane, and the two plotted to become emperors of the galaxy together. Wormwood vowed that the galaxy would tremble when the Eye of Horath opened. Ultimately, however, Kaagh was betrayed by Wormwood, and so he threw her and himself into a portal containing Horath's body, which had briefly opened at Stonehenge on Earth. (TV: Enemy of the Bane)

The Tenth Doctor observed that the death of Adelaide Brooke in 2059, a fixed point in time, led to her granddaughter, Susie Fontana Brooke, taking humanity out into the galaxy.. (TV: The Waters of Mars)

In the 26th century, the Earth and Draconian Empires spread throughout the galaxy in opposition to each other, resulting in the Draconian War. Though the conflict was ultimately resolved, the Daleks, with the assistance of and their Ogron servants, planned to reignite the conflict, which they intended to destroy both empires and thus open the way for them to conquer the galaxy. This plan, however, was thwarted by the Third Doctor. (TV: Frontier in Space)

One of the Nine Gallifreys was first destroyed during the Battle of Mutter's Cluster. (PROSE: The Taking of Planet 5)

By the Second Great and Bountiful Human Empire of the 42nd century, humanity had expanded beyond Mutter's Spiral throughout what they called the Tri-Galactic, (TV: Planet of the Ood) with spacecraft such as the SS Pentallian operating halfway across the universe according to the Tenth Doctor. (TV: 42) According to another account, humanity was confined to Mutter's Spiral until the discovery of the intergalactic drive in the 54th century. (AUDIO: The Star Men)

The Dalek Empire of the Seriphia Galaxy invaded this galaxy twice, approximately 2500 years apart. (AUDIO: Invasion of the Daleks, The Exterminators) The first of these invasions resulted in the Second Great Dalek Occupation. (AUDIO: Return of the Daleks)

The Eighth Doctor recalled a saying in the Academy about how the beat of a butterfly's wings in Mettula Orionsis caused a time storm in the Mutter's Spiral. (AUDIO: Storm Warning)

The Eleventh Doctor granted a referee the ability to watch every football game in the galaxy. (COMIC: Bow-ties for Goal Posts)

In the 82nd century, the four major powers in Mutter's Spiral were the Federation of Worlds, referred to informally as the Galactic Federation, which was run by a President; the Dalek Empire, ruled by Davros; the Cybermen, ruled by a Cyber-Emperor; and the Draconian Empire. Another major power was Josiah W. Dogbolter's Intra-Venus, Inc., a company rich enough to own Venus, Mars, and Jupiter. The Skeletoids tore through the galaxy, decimating the Daleks and Cybermen and coming close to the Federation. They were stopped by a coalition of heroes including the Sixth Doctor and Kaon. (COMIC: Kane's Story, Abel's Story, The Warrior's Story, Frobisher's Story)

Alternate timeline
When Rassilon joined forces with the Cyberiad, the Cybermen launched a fleet of Cyber-Arks out from prehistoric Earth, seeding the developing Mutter's Spiral with Cyber-Technology. This created an alternate timeline where the Cyberiad became the galaxy's dominant force, upgrading or destroying their rival powers and even going on to fight in the Last Great Time War. This timeline was later undone when a remorseful Rassilon joined forces with the Twelfth Doctor. (COMIC: Supremacy of the Cybermen)

Galactic trends
Oseidon had the highest radiation level in the galaxy. (TV: The Android Invasion)

Binary vascular systems were not common in sentient species. (PROSE: Tragedy Day)

Commander Kaagh, of the Tenth Sontaran Battle Fleet, described humans as "the runts of the galaxy". (TV: Enemy of the Bane) The Tenth Doctor claimed humans were the only species in the galaxy to invent edible ball bearings. (TV: Fear Her)

The Tenth Doctor claimed the Sontarans to be the "finest soldiers in the galaxy". (TV: The Sontaran Stratagem) Bea Nelson-Stanley recalled that her husband described the Sontarans as "the silliest race in the galaxy". (TV: Eye of the Gorgon)

A member of the Slitheen family boasted that they had officially the "best nostrils in the galaxy". (TV: Revenge of the Slitheen)

Sarah Jane Smith promoted the Viszeran Royal Fleet, which was due to pass through Earth's solar system, as the "most magnificent stellar light show this side of the galaxy". (TV: Eye of the Gorgon)

Mark Grantham believed that money was what made the galaxy go round. (TV: Warriors of Kudlak)

Sarah Jane noted that telekinetic energy fetched a huge price in some parts of the galaxy. She speculated that the Slitheen could have got the plans for the telekinetic energiser from the other side of the galaxy before building it on Earth. (TV: The Lost Boy)

Luke Smith claimed that Mr Smith, a Xylok, was the smartest life form in the galaxy. (TV: The Day of the Clown)

Clyde Langer, while under the influence of the Ancient Lights, observed that Aero was in conjunction with the galaxy. (TV: Secrets of the Stars)

Mr Smith observed that a Slitheen-Blathereen ship could travel halfway across the galaxy within a day. (TV: The Gift)

There were no metamorphic insectoids in the Galactic vector containing the Mutter's Spiral. (TV: The Unicorn and the Wasp)

Tivoli was the most conquered planet in this galaxy, leading to its inhabitants (like Gibbis) welcoming invasion and subjugation. (TV: The God Complex) Earth, however, was the most invaded planet, not only in the Mutter's Spiral but in four more galaxies. (PROSE: Borrowed Time)

Xaos was said to be the oldest planet in the galaxy. (COMIC: The Warrior's Story)

Miss Delphox promoted the Bank of Karabraxos as the "greatest bank in the galaxy." Indeed, the Twelfth Doctor noted it to be the most secure bank in the galaxy. (TV: Time Heist)

The Akoshemon system, and indeed its planets such as Akoshemon itself, were located right on the very edge of this galaxy, so much so that from Akoshemon's moon you could see the gap between this galaxy and its nearest one. (PROSE: Fear of the Dark)

Planets and star systems
Mutter's Spiral had around 150 billion stars (AUDIO: The Apocalypse Element) and 100 billion habitable planets, (PROSE: Harvest of Time) six hundred and fifty million of which were Class-M planets orbiting main sequence G-class stars, according to statisticians. (PROSE: Sanctuary)

Divisions
Mutter's Spiral was divided into four quadrants. In the Third Quadrant there were at least 8,023 sectors, with Sector 8023 containing Earth. (TV: Logopolis) Another sector was the Kappa Galanga sector, which contained the Lasron solar region. (PROSE: Prisoner of the Daleks) There were several galactic arms, including the Perseus arm where Mogar was located, (TV: Terror of the Vervoids) a western arm (PROSE: Between the Wars: A Slow Night in Paradise) and a secondary and tertiary arm. (PROSE: Burning Heart)

Politics
There were several forms of galactic government. The Galactic Alliance was one governing body. (TV: From Raxacoricofallapatorius with Love) It was also under the dominion of the Shadow Proclamation. (TV: The Stolen Earth)

At one point in their history, the Rutan Host controlled the whole Mutter's Spiral; later the Sontarans had driven them to the far fringes of the galaxy. (TV: Horror of Fang Rock)

Other references
Mockingly imitating Davros, Emperor of the Imperial Daleks, the Seventh Doctor cited conquering the galaxy amongst his goals. (TV: Remembrance of the Daleks)

Upon learning of, Ace asked the Doctor if he knew any nice and ordinary people, as opposed to "power-crazed nutters trying to take over the galaxy." Regarding his connection to the kitlings and the Cheetah Person, the Doctor believed that he was not trying to take of the galaxy "this time". (TV: Survival)

John Hart offered Jack Harkness "the glitter of the galaxy". (TV: Kiss Kiss, Bang Bang)

While in Greece in 1500 BC, the Tenth Doctor told the Slitheen that he was a journalist working for the Mutter's Spiral Herald. (PROSE: The Slitheen Excursion)

Rani Chandra suggested that Sky Smith's parents were "scouring the galaxy" in search of her. (TV: Sky)

Information from invalid sources
A depiction of Mutter's Spiral was visible in the Doctor's Five Hundred Year Diary. (NOTVALID: Tom Baker stars in John Lloyd's lost Doctor Who adventure, The Doomsday Contract)

Espiral de Mutter Calea Lactee