Piers Sellers has travelled into space as a member of two missions, so far. Piers is still an active NASA astronaut. If you have the opportunity to meet him at a public event then hearing of his experiences first hand is well worth it.
STS-112 Atlantis (October 7-18, 2002) was an International Space Station assembly mission during which the crew conducted joint operations with the Expedition-5 in delivering and installing the S-One Truss (the third piece of the station's 11-piece Integrated Truss Structure). To outfit and activate the new component Sellers performed three spacewalks and logged a total of 19 hours and 41 minutes of EVA. The crew also transferred cargo between the two vehicles and used the shuttle's thruster jets during two maneuvers to raise the station's orbit. STS-112 was the first shuttle mission to use a camera on the External Tank, providing a live view of the launch to flight controllers and NASA TV viewers. The mission was accomplished in 170 orbits, traveling 4.5 million miles in 10 days, 19 hours, and 58 minutes. STS-121 Discovery (July 4-17, 2006), was a return-to-flight test mission and assembly flight to the International Space Station. During the 13-day flight the crew of Space Shuttle Discovery tested new equipment and procedures that increase the safety of space shuttles, and produced never-before-seen, high-resolution images of the Shuttle during and after its July 4th launch. The crew also performed maintenance on the space station and delivered and transferred more than 28,000 pounds of supplies and equipment, and a new Expedition 13 crew member to the station. Piers Sellers and Mike Fossum performed 3 EVAs to test the 50-ft robotic arm boom extension as a work platform. They removed and replaced a cable that provides power, command and data and video connections to the station’s mobile transporter rail car. They also tested techniques for inspecting and repairing the reinforced carbon-carbon segments that protect the shuttle’s nose cone and leading edge of the wings. The STS-121 mission was accomplished in 306 hours, 37 minutes and 54 seconds.