Eclipse
during the Yuuzhan Vong invasion of the galaxy, Luke Skywalker developed plans for a "Great River" by which the Jedi Knights of the modern era could flee the alien invaders and hide. At the end of the River was the planet Eclipse, a remote world protected by dense asteroid fields. After the loss of Yavin 4, Luke moved the more mature Jedi Knights to Eclipse, leaving the younger children with Booster Terrik aboard the Errant Venture. Eclipse's location was a heavily-guarded secret, primarily because much of the Jedi's research into the workings of Yuuzhan Vong bio-technology was performed there. The planet itself was hidden behind the screen of an asteroid belt and the proximity of several gas giants in the system.