The STS-126 patch represents Space Shuttle Endeavour on its mission to help complete the assembly of the International Space Station (ISS). The inner patch outline depicts the Multi-Purpose Logistics Module (MPLM) Leonardo. This reusable logistics module will carry the equipment necessary to sustain a crew of six on board the ISS and will include additional crew quarters, exercise equipment, galley, and life support equipment. In addition, a single expedition crew member will launch on STS-126 to remain on board ISS, replacing an expedition crew member who will return home with the shuttle crew. Near the center of the patch, the constellation Orion reflects the goals of the human spaceflight program, returning us to the Moon and on to Mars, the red planet, which are also shown. At the top of the patch is the gold symbol of the astronaut office. The sunburst, just clearing the horizon of the magnificent Earth, powers all these efforts through the solar arrays of the ISS current configuration orbiting high above.
http://spaceflight.nasa.gov/gallery/images/shuttle/sts-126/html/sts126-s-001.html
https://commons.wikimedia.org/w/index.php?title=File:ISS_Utilization_Guide_2015.pdf&amp;page=98
NASA/Crew of STS-126