Space...the Final Frontier...
On Monday, April 21, 1997, the partial, cremated remains of some space enthusiasts blasted off into space. According to Gary Abramson of the Associated Press:
These 24 "ashtronauts" traveled in lipstick-sized aluminum capsules... The remains, which will trail the satellite in an orbit 300 miles above the earth, represent three generations of America's involvement in space... [It cost]...$4,800 to launch 0.2 ounces of cremated remains...
The most famous dead person onboard is probably Gene Roddenberry, creator of Star trek, but a man renown for his travels in inner space, Timothy Leary went along for the ride. The ashed DNA of other dead people onboard included Princeton professor Gerard K. O'Neill, and German rocket scientist Krafft Ehricke.
On January 6, 1998, some of the creamated remains of Eugene Shoemaker were put on board the lunar probe Prospector. Shoemaker will be the first human to have part of his remains entombed on another planet (OK, planetoid or moon) when the Prospector eventually crashes on the moon.
Some of James Doohan's ashes were spaced on April 28, 2007.
In 2012, some of Majel Barrett Roddenberry's ashes will be spaced, along with additional ashes of her late husband Gene's.
In July, 2015, some of the ashes of Clyde Tombaugh, who discovered Pluto in 1930, reached the orbit of Jupiter on the New Horizons spacecraft.