-
Edwin Hubble and the Hooker Telescope
With this telescope in the 1920's Edwin Hubble measured distance and velocity of galaxies, work which led to discovery of the expanding galaxy. (https://asd.gsfc.nasa.gov/archive/hubble/overview/timeline.html) -
Large Space Telescope
Astrophysicist Lyman Spitzer gathered the support of other astronomers for a "large orbital telescope". (https://asd.gsfc.nasa.gov/archive/hubble/overview/timeline.html) -
American Congress approves funding
America Congress approves funding for large space telescope.
(http://www.spacetelescope.org/about/history/timeline/) -
HST deployed
Hubble Space Telescoped deployed into orbit. (https://www.nasa.gov/mission_pages/hubble/story/timeline.html) -
Servicing Mission 1
First servicing mission for the Hubble Telescope. (https://asd.gsfc.nasa.gov/archive/hubble/overview/timeline.html)