See related story: Pop Time Capsule Returns to Earth

A view looking down from an onboard camera as Stardust leaves Earth on Feb. 7, 1999.
Courtesy of NASA
Chips carrying lists of names are attached at several points inside Stardust. The chips perform no other function, and there's no electrical connection between the chips and the spacecraft.
Courtesy of NASA
A few of the names on one of the Stardust chips, as viewed through an electron microscope. There are two different chips, one with about 136,000 names and the other with more than 1 million, with two identical copies of each of them onboard.
Courtesy of NASA
The New Horizons mission to Pluto lets you print out a certificate after you add your name to the list that will be carried onboard. This particular certificate was "presented to Darth Vader."
Courtesy of NASA