HOUSTON, March 23, 2012 /PRNewswire-USNewswire/ -- Recently back from his command of the International Space Station, NASA astronaut Mike Fossum will make several public appearances

Michael Lopez-Alegria, NASA's most experienced spacewalker and the American holding the record for the single longest spaceflight mission, has left the agency.

HOUSTON, March 12, 2012 /PRNewswire-USNewswire/ -- Michael Lopez-Alegria, NASA's most experienced spacewalker and the American holding the record for the single longest spaceflight

Two cosmonauts will conduct a six-hour spacewalk Thursday, Feb. 16, to continue outfitting the International Space Station. NASA Television will broadcast the spacewalk beginning at 7:45 a.m. CST.

Jerry Ross, the first person to launch into space seven times, has retired from NASA.