This video explores the reasons why stars are often not visible in images from rocket launches, moon landings, and the ...
A historic image showing astronaut Bruce McCandless II performing the first untethered spacewalk in history on February 23, 1984, during mission STS-41-B. Floating freely in space, propelled solely by ...
Add Yahoo as a preferred source to see more of our stories on Google. On February 7, 1984, NASA astronaut Bruce McCandless became the first person to go on a spacewalk without a tether. McCandless was ...