... The graceful spiral structure seen in this computer visualization does not portray winding spiral arms in a distant galaxy of stars. ... Watching from a hillside near Austin, Texas, planet Earth, astrophotographer Russell Croman recorded this view of their passing as clouds gracefully dimmed the brilliant moonlight. To Fly Free in Space . ... The first to experience such an "untethered space walk" were NASA astronauts Bruce McCandless and Robert Stewart during Space Shuttle mission 41-B in 1984. ...