I just want you to correct something about Yavin.
Yavin is a gas giant known for its moon of Yavin 4, where the Rebel Alliance's base was in Star Wars: A New Hope. In the Expanded Universe, Yavin has two other habitable moons, Yavin 8 and Yavin 13.
point is you can only on the moons Yavin 4, 8 and 13, not on Yavin itself. It's also mentioned in some of the books I've read!