Retired General Charles Bolden gets high praise from those who've flown with him.
With custom-made tools and a rescue plan, the seven-member crew of the Atlantis aim to upgrade the iconic telescope.
Charles Simonyi returned to Earth Wednesday. It was the last trip on which nonastronauts could hitch a ride on the Russian Soyuz spacecraft.
The shuttle launch Saturday, carrying the new module, is a key step for Japan’s space program.
Endeavour is set to launch Tuesday, carrying a Japanese astronaut and the first module of Japan's future space laboratory.