Saturn Saturn ( or Sol VI ) was the sixth planet of the Sol system . It was named by human s after the Roman god of agriculture . ( TV : " The Invisible Enemy " ) Astronomical data . Saturn was a gas giant , several million times larger than Earth . There were permanent depressions and lightning storms at both poles . Saturn had rings made of fragments of ice , which ranged in size from pebbles to ice the size of houses . The rings were made of a moon that was destroyed by the Arkive roughly around 50 million B . C . ( PROSE : " The Wheel of Ice " ) Diamonds rained in Saturn ' s atmosphere , making the planet a popular site for mining . ( PROSE : " Diamond Dogs " ) Reptilian creatures — " the Saturnian monsters " — lived on the moon . ( COMIC : " Invasion of the Daleks " ) History . The Perseus Corporeal had settlement on the moons of Saturn . ( PROSE : " The Ethereal " ) In the 21st century , Saturn was chosen over Jupiter as the first gas giant to be harvested from . Bootstrap , Inc . sent colonists to Mnemosyne to harvest bernalium and Titan to harvest methane . ( PROSE : " The Wheel of Ice " ) At some point after the 21st century , gardens were grown in the clouds of Saturn . ( PROSE : " The Wheel of Ice " ) When asked about her holiday experiences , Donna Noble listed the rings of Saturn among the locations which she had visited . ( COMIC : " The Widow ' s Curse " ) Rudy Zoom claimed he was the first man to cycle the rings of Saturn . ( COMIC : " The Eye of Torment " ) In 2400 , the Daleks invaded the solar system . Saturn ' s moons were the second target and the Saturnian monsters were wiped out . ( Humans were not present . ) ( COMIC : " Invasion of the Daleks " ) In the 25th century , one of the stops for the Interplanetary Air Race was Saturn . ( PROSE : " The Five - Leaf Clover " ) In the 26th century , cities like Chelsea 426 floated in the clouds of Saturn . ( PROSE : " The Taking of Chelsea 426 " ) In the 30th century , the palace of the Divine Empress orbited Saturn . ( PROSE : " Original Sin " ) In the 30th century , Saturn ' s moon Japetus was part of the Earth Empire . ( PROSE : " So Vile a Sin " ) In the 42nd century , Saturn was conquered by the Dalek Empire . ( AUDIO : " " Death to the Daleks ! " " ) The Fifth Doctor and Nyssa visited Saturn in the future when there was a human colony on the planet ; however , there was no explanation of how the atmosphere and surface were stabilised or how the gravity was regulated . The Doctor had heard of a utopian society on Saturn in the 47th century , but had never gotten round to visiting it before . The utopian society had several interesting aspects . When citizens reached the age of one hundred years , they were forced to retire to Titan , where they ended up doing menial jobs and remotely operating all the public services and amenities on Saturn . Every automated system on Saturn , right down to the doors , was operated by thumbprint : these thumbprints automatically cut out when the owner reached one hundred . Robot servants were used on Saturn for jobs such as waiting on tables . Babies were created " in vitro " and delivered to their parents on Saturn when they reached the age of twenty years ( therefore , there were no children nor teenagers on Saturn ) . Only people with satisfactory genetic stock were allowed to reproduce . ( PROSE : " Saturn " ) In the 51st century , the Human Empire and the Cancri entered into a business deal to mine the diamonds in the planet ' s atmosphere . ( PROSE : " Diamond Dogs " ) Saturn was visible through the window s of a spaceship transporting Dalek s and Voord s through the solar system . ( PROSE : " Doctor Who and the Daleks " )