Uranus

Now, no snickering for all you kids who still remember when you first learned about this planet! And before I tell you about the planet itself, know that it's named for Uranus, who, with Gaia, were the parents of the Titans and the ancestors of most of the Greek gods.

According to Greek mythology, Uranus mated with Gaia but despised the children that resulted from their unions (hello? Quit havin' sex with her, dude, right?). Supposedly he hated them so much he threw the youngest into Tartarus (a dungeon of suffering and torment deep within the earth's crust). This caused Gaia so much distress that she got Cronos to ambush Uranus, castrate him, and throw his testicles into the sea (owch!).*

As for the planet upon which this painful myth is based, it is the seventh from the sun, it is sometimes called the blue planet, and it spins on an axis that often points directly at the sun, thought to be a result of a collison early in its history. It also has 27 known moons, no solid surface (it's considered a gas giant), and gets its blue-green color from methane gas: "Sunlight is reflected from Uranus's cloud tops, which lie beneath a layer of methane gas. As the reflected sunlight passes back through this layer, the methane gas absorbs the red portion of the light, allowing the blue portion to pass through and resulting in the blue-green color that we see."**

* http://en.wikipedia.org/wiki/Uranus_%28mythology%29
 **http://science.nationalgeographic.com/science/space/solar-system/uranus-article/