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If you do this, Kronos, I will curse you! Someday your own children will destroy you and take your throne, just as you are doing to me!

–Ouranos to his son Kronos, in Percy Jackson's Greek Gods.

Ouranos (anglicized as Uranus) is the Greek personification of heaven. He is one of the Protogenoi, or "firstborn", the first beings that emerged from the emptiness of Chaos. Ouranos is the Greek word for heaven, and its Roman counterpart is Caelus. The Greeks imagined the sky as a solid bronze dome. He was the husband of Gaea, and he was the father of the titans with her before being conquered by his son, Kronos, and the other titans. His Roman form is Caelus, which comes from caelum, the Latin word for "sky".


Ouranos was the first husband of Gaea, whose body he surrounded in the form of the sky. They became consorts and brought forth their children: the Titans, the Cyclopes, and the Hekatonkheires. Ouranos wasn't the fatherly type and didn't care for his children at all. In fact, he hated them. He hated all his children but especially those of his children that did not look normal such as the Hekatonkheires and Elder Cyclopes. They were unsightly in his opinion and he wanted them gone but he couldn't kill them because they were immortal, just like he was. So instead, Ouranos chained all six of them up with extremely durable black chains (forged from the darkness of the night sky) and subsequently hurled them into Tartarus. This caused Gaea great grief. She was also furious because they were her children, and Ouranos cared nothing for them.

Having forged a scythe, she then gathered her remaining children, the Titans, requesting them to take it in order to get rid of Ouranos and free their brothers, the Cyclopes and the Hekatonkheires. The Titans were scared of their father as he hurled the Cyclops and Hekatonkheires easily to Tartarus and even though they detested him, they still were reluctant to murder their father. However, the youngest Titan wanted to show his bravery to the others as he wanted to show that being the smallest didn't mean he couldn't do the job. He was also angry that Gaea and Ouranos both didn't pay much attention to him so he was the youngest. So Kronos agreed to Gaea and his brothers Hyperion, Iapetus, Krios and Koios agreed to help him. However, his brother Oceanus and his sisters all refused to help and claimed they had more important things to do.

As the betrayal hadn't occurred yet, Ouranos was oblivious to his wife's plans. Gaea lured Ouranos down to the earth so he would lose most of his power while Kronos and his brothers hid themselves. As soon as Ouranos came down, Kronos's Titan brothers pinned him to the floor while Kronos took the sickle Gaea made and castrated his father. The ichor from him fell on the earth and the Furies, Nymphs, Satyrs, and Meliai were all born from it. Kronos then threw Ouranos' remains into the sea as a gesture of disgrace to Oceanus, who had refused to help take down their father. From the spot where Ouranos' genatalia landed formed sea foam, where from Aphrodite subsequently emerged. Ouranos then cursed Kronos, stating that his child would come to overthrow him, just as he had done to him. Kronos at first didn't think much about this though he later became scared of the curse causing him to swallow all his children except Zeus. Nothing was mentioned about Ouranos afterwards, since his form was spread so thin that was never able to form a consciousness again.

Percy Jackson and the Olympians

The Lightning Thief

Poseidon mentioned Ouranos to his son, Percy Jackson, while discussing his father Kronos.

The Titan's Curse

Ouranos does not formally appear but he is mentioned by the General. It is said that a Titan must hold up the Sky because Ouranos is gone and the Sky still longs to embrace the Earth. Atlas, a Titan, is assigned this torment as a punishment of the First Titan War for helping the titans.

The Battle of the Labyrinth

Ouranos and Gaea are mentioned by Annabeth Chase and a naiad.

Gaea, his wife

The Heroes of Olympus

The Lost Hero

Coach Hedge mentioned him when he was telling the story of Gaea and how she convinced Kronos to take a scythe and kill Ouranos. When he said that, Piper McLean looked at the sky, as if seeing if it had eyes and a mouth, possibly wondering of Ouranos, her grandfather.

The House of Hades

Ouranos was mentioned when Bob and Koios talked about holding him down while Kronos cut him into little pieces.

The Blood of Olympus

While searching for a way to defeat Gaea, Jason Grace asks Kymopoleia for advice and she reminds him of Ouranos' defeat, which proves that a primordial god can be defeated though not killed. Taking inspiration from the Titans' defeat of Ouranos, Leo Valdez comes up with a plan that Apollo confirms could work but would kill any mortal nearby.

After the rise of Gaea, Leo, Festus, Jason and Piper McLean carry Gaea high into the sky. They cut her off from the source of her power as the Titans did to Ouranos, mentioning Ouranos and his abuse in the process. This was the weakness Kymopoleia earlier hinted at. Piper charmspeaks Gaea back to sleep, mentioning Ouranos' abuse as one of the reasons that the goddess is so weary in the process. Gaea's essence ends up scattered by Leo and Octavian and its later stated that like the sky after Ouranos' defeat, the Earth continues to exist without Gaea and continues on as normal.


As shown in Percy Jackson's Greek Gods, Ouranos was a self-absorbed, pompous, cruel being. He also had a ferocious temper, and due to his surpassing power, none of the other Protogenoi dared challenge him. Despite having feelings for Gaea, neither Pontos nor Tartarus acted on their feelings due to Ouranos' marriage with her. In Percy Jackson's Greek Gods, it is stated that his son Kronos had inherited his infamous cruelty and bad temper from Ouranos. 

Ouranos was a terrible father, and he did not care for his children at all. He ignored the Titans, and hurled the Elder Cyclopes and Hekatonkheires into Tartarus merely for how they looked. He was a terrible husband too, barely spending time with Gaea and taking cruel pleasure in throwing both sets of their triplets into Tartarus. However, it is possible that Ouranos loves or desires her somewhat, although it is unclear where he is or what he is doing, as stated in The Titan's Curse by Atlas, who said, "The Sky still yearns to embrace the Earth."


In Percy Jackson's Greek Gods, Ouranos is described as looking tall and buff, with longish dark hair. He only wore a loincloth, and his skin changed color - sometimes blue with cloudy patterns (during the day), and sometimes dark with glimmering stars (during the night).


The King of the Protogenoi and the embodiment of the Sky, Ouranos was one of the most powerful entities in the series, rivaled by Gaea and Tartarus. Infinitely powerful in his domain, he was only defeated when lured down to earth. Even then, he was only defeated by the combined efforts of five of his sons and his wife, Gaea.

  • Atmokinesis: As protogenos of the Sky, he has absolute control and divine authority over the weather.
    • Nephelokinesis: As the protegonos of the sky Ouranos has complete control of clouds.
    • Electrokinesis: Ouranos has complete and utter control of electricity.
  • Aerokinesis: As protogenos of the Sky, he has absolute control and divine authority over the air.
  • Caelum-Umbrakinesis: As seen in Percy Jackson's Greek Gods, Ouranos could use the darkness of the night sky to generate extremely durable black chains, with which he bound his Elder Cyclopes and Hekatonkheire children before flinging them into Tartarus.
  • Creation of Sentient Life Forms: In Percy Jackson's Greek Gods, Ouranos' blood was shown to have so much power that many sentient life forms (possibly including the Furies), sprang from it over the millennia. His sliced and mangled remains also created Aphrodite, an Olympian Goddess.
  • Massive Strength: Ouranos easily overpowered the Elder Cyclopes and the Hundred-Handed Ones, chaining them up and hurling them into Tartarus (albeit, they were newborns at the time but it was still a feat that took the three most powerful titans to manage later on). Furthermore, it took four of his Titan sons, who were among the most powerful Titans to ever exist, to pin him down and that was when he was greatly weakened, and even then, he put up a fierce fight.
  • Shapeshifting: Ouranos can shapeshift as seen when he takes physical form. 
  • Supreme Power: Ouranos has extreme levels of power far superior to that of any of the Olympians, Giants, and Titans, seeing as he is the first High God and was able to easily chain up and throw many of his powerful children into Tartarus single-handedly (a feat that required Kronos, Atlas, and Hyperion working together to later replicate). His power is rivaled by only Gaea and Tartarus, and surpassed only by Chaos.
  • Tongue of the Old Times fluency: According to Tyson in The Battle of the Labyrinth, this is the ancient language that Gaea spoke to the Titans, Elder Cyclopes and Hekatonkheires before the birth of the Olympian gods. Ouranos and Gaea must have communicated in this language as well. 


  • Ouranos' first and only appearance was in Percy Jackson's Greek Gods
  • The 7th planet from the sun, Uranus, is named after him.
  • In some myths, Ouranos was born as a son of Gaea before he became her consort.
  • It is mentioned that Gaea cannot be defeated and can only be kept asleep; however, it is unknown why Ouranos actually died when Kronos cut him to pieces. Since Atlas said that "the sky still longs to embrace the earth", Ouranos may still be alive in some form.
    • Kronos, like Ouranos, was cut to pieces with the scythe but his essence continued existing, albeit imprisoned within Tartarus. This could mean that Ouranos himself is still alive in some form of consciousness, existing without a physical body.
    • It has also been speculated by some scholars of Greek mythology that after Kronos castrated him, he fled away back to his domain in fear of the scythe. It could be that Gaea had crafted the scythe specifically to harm Ouranos.
    • Ouranos may have been scattered like Kronos and Gaea ultimately were. It was shown with the defeat of Gaea that even the primordial gods could be beaten in this way and mention was made of Gaea now being like Ouranos, suggesting that he too was scattered.
    • In The Hidden Oracle, Apollo mentions seeing the sleeping face of Ouranos in the sky.
  • Ouranos is the father of Kronos, who is father of Zeus, Poseidon, and Hades, making Ouranos the great-grandfather of Percy Jackson, Thalia Grace, Jason Grace, Hazel LevesqueBianca and Nico di Angelo.​
  • The periodic element Uranium is named after him.
  • Aphrodite emerged from the sea foam which formed where the pieces of Ouranos' genitalia were thrown into the sea by Kronos, therefore technically making him her father and the grandfather of the members of the Aphrodite Cabin.
  • Ouranophobia (also known as Uranophobia) is the fear of heaven, which is named after Ouranos. 
  • The Romans simply Latinized his name as "Uranus", with which they call him most of the time. However, they do have a non-Greek Latin name for Uranus, and it is "Caelus". 
  • The Seven got inspiration from Ouranos' defeat in order to defeat his wife Gaea.
  • His Egyptian equivalent is Nut.
  • His Mayan equivalent is Alom.
Percy Jackson and the Olympians
Core Series: The Lightning Thief | The Sea of Monsters | The Titan's Curse | The Battle of the Labyrinth | The Last Olympian
Main Characters: Percy Jackson | Grover Underwood | Annabeth Chase | Tyson | Clarisse La Rue | Thalia Grace | Nico di Angelo | Chiron | Luke Castellan | Rachel Elizabeth Dare
Secondary Characters: Sally Jackson | Travis Stoll | Connor Stoll | Mrs. O'Leary | Silena Beauregard | Charles Beckendorf | Paul Blofis | Blackjack | Zoë Nightshade | Bianca di Angelo | Juniper | Ethan Nakamura | Daedalus
Minor Characters: Gabe Ugliano | Tantalus | Frederick Chase | Michael Yew | May Castellan | Austin Lake | Kayla Knowles | Maria di Angelo | Will Solace
Olympian Gods: Zeus | Hera | Poseidon | Demeter | Ares | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus | Hades | Hestia
Minor Gods: Amphitrite | Ariadne | Hecate | Iris | Janus | Morpheus | Nemesis | Pan | Persephone | Triton
Titans: Kronos | Atlas | Calypso | Iapetus | Krios | Hyperion | Oceanus | Prometheus
Mythical Creatures: Minotaur | Centaur | Furies | Satyr | Cyclops | Manticore | Ophiotaurus | Nemean Lion | Empousa
Related Content: Rick Riordan | The Lightning Thief (film) | Sea of Monsters (film) | The Demigod Files | Demigods and Monsters | The Ultimate Guide | The Heroes of Olympus | The Trials of Apollo | Percy Jackson Demigod Collection | The Lightning Thief: Illustrated Edition | Disney+ Series
The Heroes of Olympus
Core Series: The Lost Hero | The Son of Neptune | The Mark of Athena | The House of Hades | The Blood of Olympus
Main Characters: Jason Grace | Piper McLean | Leo Valdez | Percy Jackson | Frank Zhang | Hazel Levesque | Annabeth Chase | Iapetus/Bob | Reyna Ramírez-Arellano | Nico di Angelo | Gleeson Hedge
Secondary Characters: Hylla Ramírez-Arellano | Dakota | Tyson | Ella | Octavian | Halcyon Green | Dr. Howard Claymore | Alabaster C. Torrington | Lamia
Minor Characters: Rachel Elizabeth Dare | Grover Underwood | Thalia Grace | Clarisse La Rue | Fleecy | Mrs. O'Leary | Kinzie | Arion | Calypso | Lou Ellen Blackstone | Chiron | Will Solace | Tristan McLean | Don | Julia | Jacob | Michael Varus | Burly Black | Medea | Midas | Lityerses | Phineas | Otrera | Echo | Narcissus | Sciron | Pasiphaë
Olympian Gods: Zeus | Hera | Poseidon | Hades | Ares | Demeter | Athena | Apollo | Artemis | Hephaestus | Aphrodite | Hermes | Dionysus
Minor Gods: Achelous | Aeolus | Asclepius | Boreas | Eurus | Hecate | Iris | Hypnos | Keto | Khione | Kymopoleia | Mithras | Nemesis | Nike | Notus | Phorcys | Serapis | Thanatos | Triptolemus | Zephyros
Roman Gods: Jupiter | Juno | Neptune | Pluto | Mars | Minerva | Ceres | Lupa | Bellona | Fortuna | Janus | Terminus | Vulcan | Mercury | Apollo (Roman) | Diana | Venus | Bacchus | Pomona | Aquilon | Hercules | Cupid | Auster | Favonius | Letus | Victoria
Giants: Enceladus | Porphyrion | Alcyoneus | Polybotes | Ephialtes | Otis | Damasen | Clytius | Mimas | Orion | Hippolytos | Thoon | Periboia
Undead: Gray | Zombie
Primordial Gods: Gaea | Tartarus | Ourae | Nyx | Chaos | Ouranos | Akhlys | Hemera | Elpis | Spes
Monsters and Magical Creatures: Cynocephali | Gorgon | Gryphon | Harpy | Basilisk | Lycanthrope | Gegeines | Cyclops | Katobleps | Unicorn | Giant Eagle | Ichthyocentaur | Satyr/Faun | Storm Spirit | Laistrygonian Giant | Lares
Related Content: Rick Riordan | Haley Riordan | Percy Jackson and the Olympians | Percy Jackson and the Olympians: The Ultimate Guide | The Demigod Files | The Demigod Diaries | The Son of Sobek | The Singer of Apollo | The Staff of Serapis | Percy Jackson's Greek Gods | Percy Jackson's Greek Heroes | The Crown of Ptolemy | Demigods & Magicians | Demigods of Olympus | Percy Jackson Demigod Collection