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Mission Information

STS-121
The STS-121 crewmembers pose for an in-flight photo in the Destiny laboratory.

Image above: The STS-121 crewmembers gather for an in-flight crew photo in the Destiny laboratory of the International Space Station. From the left (bottom) are astronauts Stephanie Wilson, mission specialist; Steve Lindsey, commander; and Lisa Nowak, mission specialist. From the left (top) are astronauts Piers Sellers, Mike Fossum, both mission specialists; and Mark Kelly, pilot. Credit: NASA

The crew of Space Shuttle Discovery tested new equipment and procedures that increase the safety of space shuttles during the STS-121 mission to the International Space Station. It also performed maintenance on the space station and delivered supplies, equipment and a new Expedition 13 crew member to the station.

This mission carried on analysis of safety improvements that debuted on the Return to Flight mission, STS-114, and built upon those tests.

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Mission Information

The STS-121 Mission

Continued shuttle safety testing and a trip to the International Space Station were featured during STS-121.
The STS-121 Crew

Meet the astronauts of the STS-121 mission aboard Space Shuttle Discovery.

Features

Discovery's Mission Accomplished

A picture-perfect landing returns the STS-121 Discovery astronauts safely to Earth after a successful mission to the International Space Station.
Getting Ready for an Orbital Gig

A handful of old friends gathered recently for a surprise presentation to STS-121 Mission Specialist Mike Fossum.
STS-121 Crew Gets 'Hands-On' Look at Discovery

The two-day event at Kennedy gave mission astronauts a chance to handle the hardware.
From the Seas to the Skies

For Mark Kelly, becoming an aviator for the Navy would ultimately lead to his dream assignment as a NASA astronaut.
Loading Leonardo

Hey, did someone up there in space order a freezer?
Atlantis Crew Readies for STS-121

Astronauts get hands-on test in Florida.
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Crew Members Added to Second Shuttle Return To Flight Mission

NASA astronauts Lisa Nowak and Stephanie Wilson are joining the crew of the second space shuttle Return to Flight mission.
NASA Names Crew for STS-121

Four NASA astronauts have been chosen to fly on the newly-created Space Shuttle mission, STS-121.