As Luke's lightsaber from Return of the Jedi travels aboard the space shuttle Discovery, fans will be able to leave messages for the astronauts. During their mission (Oct. 23 - Nov. 6th), the messages will be collected for a cd to be presented to the crew upon their return and debriefing. After the mission, the lightsaber will be part of a new exhibit at Space Center Houston, including small collection of famous Star Wars movie props and a full-size X-wing starfighter, through Jan. 1. You can find out more at StarWars.com.

See also:
Luke Skywalker's Original Lightsaber To Blast Off Into Space