The school-bus-sized observatory launched on April 24, 1990 and overcame early setbacks to become one of the most ...

For over six decades, Ansel Adams turned his camera on the American wilderness, becoming one of the most recognized photographers in the world. Browse some of Adams's most beloved images in this ...

NASA astronaut Bruce McCandless -- who died at the age of 80 on Thursday -- is that untethered astronaut in one of the most iconic space photos of all time. SEE ALSO: Jupiter has the blues ...