|Protogenos of the Sky|
|Father of the Titans|
|Former Lord of the Heavens|
|Family||Chaos (father) |
Gaea (mother and wife)
Titans, Cyclops, and Hekatonkheires (children)
Furies and Aphrodite (daughters)
|Eye Color||Any color|
|Hair Color||Any color|
|Weapons|| Wind |
|Greek/Roman form||Caelus (Roman)|
|Appearances|| The Lightning Thief (mentioned) |
The Titan's Curse (mentioned)
The Battle of the Labyrinth (mentioned)
The Lost Hero (mentioned)
Mark of Athena (mentioned)
The House of Hades (mentioned)
Ouranos or Uranus is the Greek protogenos personifying the sky. Ouranos is the Greek word for sky (a cognate of the English word air), and his Roman counterpart is Caelus. The Greeks imagined the sky as a solid dome of brass whose edges descended to rest on the outermost edges of the earth. Ouranus is actually Greek, although the Romans used that name for their primordial lord of the sky. He is the ex-husband and son of Gaea.
Ouranos didn't care for his children, in fact, he hated them. He hated his children that did not look normal most of all, such as the Hecatonkhires and Cyclopes. They were unsightly in his opinion and he wanted them gone. But he couldn't kill them, because they were immortal.
So instead, Ouranos threw the Hekatonkhires and Cyclopes into Tartarus and positioned Kampê to guard them. This caused Gaea great grief. She was also furious because they were her children, and because Ouranos cared nothing for them. She asked her children, the Titans, to get rid of Ouranos so she could save the Cyclopes and the Hecatonkhires. Only her youngest son Kronos was brave enough to do it. He took a flint scythe Gaea made and castrated his father. Some accounts state that the genitals were thrown into the sea, and that from the froth rose Aphrodite. Nothing was mentioned about Ouranos afterwards. Other accounts stated that Ouranos pushed the Titans back into Gaea because the Oracle said that one of his children would overthrown him.
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 because the Sky still longs to embrace the Earth. Atlas, a Titan, is assigned this torment as of the First Olympian War.
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. Maybe wondering of Ouranos, her grandfather.
Ouranos was a terrible father, and he did not care for his children at all. He was a terrible husband too, because it didn't hurt him that Gaea was so sad about the loss of her children. Though 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 The Titan's Curse by Atlas, who said that "The sky still yearns to embrace the earth."
- Atmokinesis: As protogenos of the Sky, he has absolute control and divine authority over the weather.
- Aerokinesis: As protogenos of the Sky, he has absolute control and divine authority over the air.
- He has superior power to the Olympians and Titans (except for the most powerful), seeing as he is an ancient elder deity and was able to throw many of his powerful children (the elder Cyclopes for example) into Tartarus.
- The 7th planet from the sun, Uranus, is named after his Greek form. It is also the only planet in the Solar System, excluding Earth, to bear a Greek name while others are named after Roman deities.
- It is mentioned that Gaea cannot be defeated and only kept asleep; however, it is unknown why Ouranos actually died when Kronos cut him to pieces. But because the sky still longs to embrace the earth, Ouranos may still be alive in some form because he is immortal.
- In the actual Greek mythology, it is mentioned that Ouranos is not chopped up entirely to pieces but only his private parts.
- Ouranos is the father of Kronos, who is father of Zeus, Poseidon, and Hades, making Ouranos the great-grandfather of Percy Jackson, Thalia Grace, and Bianca and Nico di Angelo.
- Caelus is the father of Saturn, who is therefore father of Jupiter and Pluto, thus making Caelus the great-grandfather to Jason Grace and Hazel Levesque.
- He is the father of the Titans through his wife and mother Gaea, making him the father and half-brother to the Titans.
- He's the grandfather of the Big Three.
- The periodic element Uranium is named after him.
- Aphrodite was formed out of the sea foam from the pieces of Ouranos 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, which is named after Ouranos' Roman counterpart, Uranus) is the fear of heaven, which is named after Ouranos.