Boganios

"It's so kriffing hot at that wretched place. My Master insisted that I should go there to further learn the Sith ways."

- Anonymous female Sith talking about Boganios

Boganios was a large volcanic planet that was, surprisingly, livable due to its high ground and mountains.

History
Boganios was first settled just before the Force Wars by Sith looking for a new planet to build bases, as Korriban was getting full of them.

Behind the scenes
Look at the first five letters of Boganios. Bogan means Dark side. This planet is supposed to be like a second Korriban to the Sith, as they had temples on Boganios, too.