A giant cluster of about 3,000 stars called Westerlund 2. The cluster resides in a raucous stellar breeding ground known as Gum 29, located 20,000 light-years away in the constellation Carina. NASA, ESA, STScI/AURA hide caption

itoggle caption NASA, ESA, STScI/AURA

A stump remains in the median of Manchester Boulevard as workers remove trees to clear a path for the space shuttle Endeavour in Inglewood, Calif., Tuesday. Residents are upset that 400 trees might be cut down to allow the shuttle to travel from the airport to its new home at a science center. Reed Saxon/AP hide caption

itoggle caption Reed Saxon/AP

SpaceX rocket Falcon 9 at Cape Canaveral in Florida was scheduled to launch Saturday morning, but aborted just before liftoff. Roberto Gonzalez/Getty Images hide caption

itoggle caption Roberto Gonzalez/Getty Images

More than a million people were expected in the area around the Kennedy Space Center to watch the launch. Many arrived before sunrise to claim the best seats. Scott Cameron/NPR hide caption

itoggle caption Scott Cameron/NPR

Food packets containing the astronauts' "all-American meal," including (clockwise from top left) corn, chicken, brisket, and beans, along with a lemonade, at right. Devin Boldt/NASA - JSC hide caption

itoggle caption Devin Boldt/NASA - JSC

The space shuttle Atlantis lifts off from the Kennedy Space Center Friday, July 8, 2011, in Cape Canaveral, Fla. Morry Gash/AP hide caption

itoggle caption Morry Gash/AP