Sharnax was a planet originally controlled by the Drashani Empire. It was mostly covered in marshes.
The House of Sorsha had mining operations on the planet.
During the civil war between the Houses of Gadarel and Sorsha, Sharnax was overrun by Igris. A decade later, Princess Aliona crashed on Sharnax. A rescue team was sent out, but it also crashed on Sharnax. (AUDIO: The Burning Prince)