The Hubble Space Telescope, launched in 1990, has delivered spectacular images of celestial objects and activity.
Named for astronomer Edwin P. Hubble, the telescope received five, in-orbit instrument upgrades over its lifetime. An optical design and engineering challenge, Hubble demonstrates the need to attract the best and brightest to the field. (Photo: gettyimages/Stocktrekimages)
(Courtesy of gettyimages/Stocktrekimages)