From Entertainment Weekly:
Being a Star Wars fanatic — let’s face it, there’s no such thing as merely being a Star Wars “fan” — means familiarizing yourself with a lot of names of a bunch of odd-sounding planets. Some, like the ice planet Hoth, play a huge role in George Lucas’ intergalactic ring cycle, especially if you need to seek shelter inside the guts of a snowy beast. Ditto for A-list locales like Endor and Alderaan. But others, like Orvax and Lwhekk? That’s straight-up nerd terrain.
Read more here:
http://popwatch.ew.com/2011/01/14/star-wars-map/