*Updated Monday, May 16, 2011
At 8:56 AM EDT today, the space shuttle Endeavour blasted off for the International Space Station (ISS) on its final 16-day mission. Endeavour will deliver spare parts for the space station as well as the Alpha Magnetic Spectrometer, a particle detector designed to study the universe and its origins. The mission will also feature the last scheduled spacewalks by shuttle crew members. Astronauts will work outside the space station to install new components and conduct repairs.