STAR Trek actor Patrick Stewart is boldly going where no-one has gone before.
His signature is among 616,400 blasted into space on a four-year mission to explore Saturn.
The names have been copied on to a DVD by the Planetary Society, a group dedicated to advancing space exploration and the search for extraterrestrial life.
Also included were the inked paw prints of a few dogs and cats.
Mirfield-born Stewart is famed for playing Capt Jean-Luc Picard in Star Trek: the Next Generation.
The recently-appointed chancellor of Huddersfield University joined people from 81 countries in giving signatures almost 10 years ago in preparation for the Cassini probe.
Protected in a shallow aluminium box with two plates around it, the disc could last a million years or more in orbit through the Saturnian system.
Charley Kohlhase, Planetary Society adviser and Cassini's mission design manager, said: "All those people who sent in their signatures almost a decade ago are flying with us and can say "I'm up there'."
* The £1.6bn joint US-European mission is by far the most complex and ambitious unmanned space expedition in history. It includes the first orbit of Saturn and the most distant landing on an interplanetary body ever attempted.
* The Cassini spacecraft is due to slip through two of Saturn's rings and set itself in orbit around the giant planet.
* Cassini was launched in the United States in 1997 and has taken seven years to complete its 2.2bn-mile journey
* Saturn's most famous feature is its glorious rings, which Cassini will scan from a distance of just 15,000km. Scientists are anxious to know how the rings, which may only be about 100 million years old, came into being.
* Over the next four years Cassini it will have 52 close encounters with seven of Saturn's 31 known moons.
* Landing on the moon Titan will be the high point of the mission. Huygens, a European Space Agency lander, will detach itself from Cassini on Christmas Day.
* Titan is larger than the planets Mercury or Pluto, with a thick smoggy atmosphere. It's surface pressure is 50% higher than the Earth's. The probe may land in a sea of liquid methane or ethane.
* The spacecraft carries two cameras, one of which is so precise that if placed on St Paul's Cathedral it could resolve a 1p coin on top of the London Eye.
* Britain is playing a key role in the mission, providing six instruments on Cassini and two on Huygens.