NASA has assigned the crew for space shuttle Discovery’s STS-129 mission. The flight will deliver two experiment racks to the International Space Station.

Two STS-129 astronauts are tweeting about their pre-launch preparation and are expected to provide updates to their Twitter accounts during the shuttle mission.

The space shuttle Atlantis is seen via a camera mounted to the exterior of the International Space Station as it arrives on Nov. 18, 2009 during NASA's STS-129 mission to deliver much-needed spare ...

Two STS-129 astronauts are tweeting about their pre-launch preparation and are expected to provide updates to their Twitter accounts during the mission, NASA said.

The STS-129 mission will focus on storing spare hardware on the exterior of the space station. The flight will include three spacewalks and install two platforms on the station’s truss, or backbone.

This NASA photograph taken by STS-129 mission astronauts aboard Space Shuttle Atlantis shows a partial view of Atlantis' payload bay backdroped by the Earth, November 17, 2009.

Pictured from the left are NASA astronauts Leland Melvin, Robert L. Satcher Jr., both STS-129 mission specialists; Charles O. Hobaugh, STS-129 commander; Nicole Stott, STS-129 mission specialist ...

"His lasting legacy of fortitude will continue to impact and inspire the Johnson workforce, future explorers, and the nation ...

Space Shuttle Atlantis launched today on an 11-day mission to deliver 14 tons of supplies, science experiments and spare parts to the International Space Station as the outpost transitions from […] ...

Wilmore has been on two spaceflights, including one aboard space Shuttle Atlantis (STS-129), and has spent 178 days in space. Williams was selected as a NASA astronaut in 1998.

The Materials on the International Space Station Experiment 7, designed and built by the Naval Research Laboratory, launched aboard STS-129 for transport to the International Space Station.