A full-sized test unit of the NASA Webb Telescope’s sunshield was stacked & unfurled for the first time
Astronaut Buzz Aldrin descending the ladder and stepping onto the Moon. Neil Armstrong's “one small step” onto the lunar surface was actually a 3-foot jump down off the lunar module’s ladder to the ground.
Space shuttle Atlantis is featured in this image photographed by an Expedition 23 crew member on the International Space Station soon after the shuttle and station began their post-undocking relative separation. Undocking of the two spacecraft occurred at 10:22 a.m. (CDT) on May 23, 2010, ending a seven-day stay that saw the addition of a new station module, replacement of batteries and resupply of the orbiting outpost.