Black hole Black holes were regions in space created when the remains of a dense star of normal matter collapsed far enough to drill a hole through the fabric of space , ( PROSE : " Sanctuary " ) creating a singularity . Their incredible density resulted in a strong gravitational pull . Physics . The gravity of a black hole was so great that nothing , not even light or time , could escape its pull . They could act in two ways : some holes did , as sometimes speculated , lead to other universe s and served as portals ; other holes just ate and ate and ripped up star system s and anything else . ( TV : " The Impossible Planet " ) Black holes could also serve as a gateway into hyperspace . ( TV : " The Horns of Nimon " ) One belief stated that anything consumed in a black hole , theoretically , still existed , saved as compressed information in the event horizon . ( AUDIO : " " ) Black holes were caused when stars collapsed . There were several types of black holes . The biggest were called " super massive black holes " . Those black holes could be found at the heart of every galaxy . They had a mass about 7 billion times that of the Sun . ( WC : " " ) Time moved more slowly for objects nearer to a black hole than for objects farther away from a black hole . ( TV : " World Enough and Time " ) Light could not escape the Schwartzchild radius of a black hole . ( PROSE : " The Book of the War " ) Black holes and Time Lords . The Tenth Doctor said to Rose Tyler that his people , the Time Lord s , " practically invented black holes . Well , in fact , they did . " ( TV : " The Satan Pit " ) Omega and Rassilon destroyed the star Qqaba ( COMIC : " Star Death " ) to produce an energy source powerful enough to enable time travel . Omega , thought dead , survived his journey through this black hole , although he was trapped within it . He was able to shape matter within it at his will . ( TV : " The Three Doctors " , " Arc of Infinity " ) Rassilon brought back either a black hole or its singularity to become the Eye of Harmony . ( TV : " The Deadly Assassin " ) When two versions of the Doctor ' s TARDIS collided , the Tenth Doctor combined a black hole and a supernova to stop a black hole from being created , after witnessing it in his fifth incarnation . ( TV : " Time Crash " ) The Doctor ' s TARDIS had the power to both resist the pull of a black hole and to tug the Walker Expedition ' s rocket out of the black hole ' s gravitational field . ( TV : " The Satan Pit " ) However it seemed to take some technique to pilot a TARDIS away from a black hole , as ' going too fast ' would not only fail to escape it , but also cause the dematerialization circuit to burn out . ( TV : " The Doctor Falls " ) Effects on the universe . Before the universe began , the ancient Disciples of the Light fixed the planet Krop Tor in geostationary orbit around K37 Gem 5 . The Tenth Doctor , before learning of this , regarded the planet ' s fixed orbit as scientifically impossible . ( TV : " The Impossible Planet " ) Both the black hole and the planet served as a prison in which to confine the Beast . ( TV : " The Satan Pit " ) In 2986 , the Black Hole of Tartarus presented a hazard to spacecraft . ( TV : " Terror of the Vervoids " ) When a Mondasian colony ship fell into the range of a black hole , twenty of the ship ' s fifty member crew went down to the bottom of the ship to stabilise the engines . The time dilation caused by the black hole meant they were down there for several generations whilst the remainder of the crew only experienced two days . The colonists were forced to turn themselves into Cybermen to survive and eventually converted the rest , leaving only the alien Jorj at the time of The Doctor ’ s arrival . ( TV : " World Enough and Time " ) Artificial black holes . Artificial black holes could be created . In 2006 or later , an experiment in Switzerland created an artificial black hole , which K9 Mark IV spent about three years trying to stabilise in order to protect Earth . ( TV : " Invasion of the Bane " , " The Mad Woman in the Attic " ) In 2009 , Ship converted the black hole into fuel , releasing K9 and saving the Earth . ( TV : " The Mad Woman in the Attic " ) The Parablox website included instructions for building a black hole out of black bricks ; amateur builders could use blue bricks past the Schwartzchild radius without anyone noticing . ( PROSE : " The Book of the War " ) Black holes could also be used for transportation . The Nimon s based most of their technology on artificial black holes , especially for long distance transportation . ( TV : " The Horns of Nimon " ) During the Year That Never Was , created a fleet of Toclafane rocket s , each holding a black hole converter so that he could wage war on the rest of the universe and turn Earth into " New Gallifrey " under his control . The rockets faded away when time was reversed . ( TV : " Last of the Time Lords " ) Some time before 2050 the Oroborus destroyed the planet Centauri by siphoning off its future , resulting in the planet being turned into a black hole . ( TV : " Oroborus " ) Omega ordealed a plan to use the Hand of Omega , a stellar manipulator , to create a black hole to flee the anti - matter universe he was trapped in . That black hole threatened to destroy the entire universe . ( AUDIO : " Intervention Earth " ) The body of Hydroflax contained a split quantum actualiser , thus its power source was a perpetually stabilised black hole . ( TV : " The Husbands of River Song " ) Other references . An arch - criminal from the planet Nefrin , Brimo , sentenced to remain alive forever in an eternity capsule , found herself inside a black hole when Nefrin ' s sun collapsed upon itself . Much like Omega , she found herself in a mutable world shaped by her imagination and drained energy from the universe outside it . ( COMIC : " The Time Witch " ) Before his death , Eugene Jones planned on attending a lecture entitled " Black Holes and the Uncertainty Principle " at Aberystwyth University with his friend Gary . Having found a flyer for the lecture in Eugene ' s room , Gwen Cooper showed up there and spoke to Gary for questioning . ( TV : " Random Shoes " ) There was a black hole in the Casta Pizellus galaxy . ( PROSE : " I Am a Dalek " ) A black hole and a white hole nearly combined and destroyed the Earth . ( TV : " The Eclipse of the Korven " ) Mother of Mine was jettisoned into the black hole of a collapsing galaxy , trapping her in its event horizon for , relative to her perception , eternity . ( TV : " The Family of Blood " ) Whenever the Vigil teleported , they appeared from a tiny black hole . ( TV : " The Rings of Akhaten " ) Millionaire Maxwell Curtis funded the Naryshkin Institute in hopes of finding a solution to his gradually turning into a black hole . ( PROSE : " Time Zero " )