Ouranos
Ouranos (anglicized as Uranus) is the Greek personification of the sky. He emerged as one of the primordial deities, born from @Gaea. Ouranos fathered the Titans, Cyclopes, and Hekatonkheires with Gaea. Ouranos ruled the sky before he was overthrown by his son @Kronos. Ouranos means "sky" or "heaven" in ancient Greek and his Roman counterpart is Caelus, The Latin word for the "sky".
History
Birth and Life
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.
A Timely Patricide
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 scythe 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.