Hubble Space Telescope atop space shuttle Discovery for launching into the space on display (a model) in the background of the space. It was a joint venture of NASA and European Space Agency. It was launched on 24 Apr 1990. In the last 20 years, the Hubble Space Telescope has revolutionized the way humanity views the universe. In many ways, it may have been the most influential telescope since Galileo peered at the night sky with one four centuries ago.