NASA/AP The Hubble Space Telescope is shown in the cargo bay of the Space Shuttle Columbia Sunday, March 3, 2002, in one of the first close-up images of the telescope since December, 1999. Loading... April 19, 2015 By Staff 1977: Congress approves funding for the Large Space Telescope (LST). 1978: Astronauts begin training for space telescope missions. 1979: Work begins on the telescope’s 2.4-meter diameter mirror. 1981: Space Telescope Science Institute begins operations in Baltimore. 1983: LST is renamed Hubble Space Telescope, after astronomer Edwin Hubble. 1985: Hubble is completed. 1990: Shuttle Discovery launches Hubble into orbit on April 25. Two months later, flaws are discovered in the primary mirror. 1993: First servicing mission is launched. 1994: Hubble sends back images of comet Shoemaker-Levy 9 as it hits Jupiter. 1995: It takes the famous “Pillars of Creation” photo of the Eagle Nebula. 1996: Hubble “deep field” images reveal an unimaginable number of galaxies. 2001: Observations detect elements of an exoplanet. 2002: On the third servicing mission, new solar panels are installed. 2005: Images reveal two previously unknown moons orbiting Pluto. 2008: Hubble completes 100,000th orbit. 2010: Distant galaxies show what the universe looked like at one-tenth its current age. 2011: The 10,000th scientific paper is published using Hubble data. 2012: Hubble sends back dramatic images of a planetary nebula, NGC 5189. 2013: NASA launches the Frontier Fields project to look at galaxies deeper in the universe than ever before. 2014: Hubble spots one of the farthest, smallest galaxies ever seen – 13 billion light-years away. 2014: Hubble finds best evidence yet of an ocean on Ganymede, a moon of Jupiter. Sources: European Space Agency, NASA Follow Stories Like This Get the Monitor stories you care about delivered to your inbox.