25 April 1990: In orbit 380 miles (612 kilometers) above Earth, the crew of Discovery (STS-31) released the Hubble Space Telescope from the cargo bay.
This satellite was designed to study the universe in ultraviolet, visible and infrared light, with a clarity never before seen.
© 2019 Bryan R. Swopes
24 April 1990, 12:33:51 UTC: Space Shuttle Discovery (STS-31) lifted off from Launch Complex 39B at the Kennedy Space Center, Cape Canaveral Florida, on a mission to place the Hubble Space Telescope in Earth Orbit.
The STS-31 flight crew were Loren J. Shriver, Commander; Charles F. Bolden, Jr., Pilot; Steven A. Hawley, Mission Specialist; Kathryn D. Sullivan, Mission Specialist; Bruce McCandless II, Mission Specialist.
The Hubble Space Telescope is named after Edwin Hubble, an early 20th century astronomer who discovered galaxies beyond our own Milky Way galaxy. It is an optical Ritchey–Chrétien telescope (an improved Cassegrain reflector). Star light enters the telescope and is collected by a large 7 foot, 10.5 inch (2.400 meter) diameter hyperbolic mirror at the back end. The light is reflected forward to a smaller hyperbolic mirror, which focuses the light and projects it back through an opening in the main reflector. The light is then gathered by the electronic sensors of the space telescope. These mirrors are among the most precise objects ever made, having been polished to an accuracy of 10 nanometers.
The Hubble Space Telescope is 43.5 feet (13.259 meters long. The light tube has a diameter of 10 feet (3.048 meters) and the aft equipment section is 14 feet (4.267 meters) in diameter. The spacecraft weighs 27,000 pounds (12,247 kilograms).
The HST orbits the Earth every 97 minutes at an altitude of 320 nautical miles (593 kilometers). The telescope was last serviced in 2009. Originally designed to operate for 15 years, the HST is now in its 26th.
¹ Colonel Bolden reached the rank of Major General, United States Marine Corps, before retiring in 2003. He was served as Administrator, National Aeronautics and Space Adminstration, 17 July 2009–20 January 2017.
² Lieutenant Commander Sullivan left NASA in 1993, and retired from the U.S. Navy with the rank of Captain, in 2006. She served as Under Secretary of Commerce for Oceans and Atmosphere/Administrator, National Oceanic and Atmospheric Administration (NOAA), 28 February 2013–20 January 2017.
© 2017, Bryan R. Swopes
2 December 1993, 09:27:00 UTC, T minus Zero: Space Shuttle Endeavour (STS-61) lifted off from Launch Complex 39B at the Kennedy Space Center, Cape Canaveral, Florida. The mission was to service the Hubble Space Telescope in Earth orbit. This was Endeavour‘s fifth flight.
The flight crew were Mission Commander Colonel Richard O. Covey, United States Air Force, on his fourth space flight, with shuttle pilot Captain Kenneth D. Bowersox, U.S. Navy, on his second flight. Mission Specialist Kathryn C. Thornton, Ph.D., on her third space flight; Professor Claude Nicollier, Captain, Schweizer Luftwaffe, (Swiss Air Force) and European Space Agency, on his second space flight; Jeffrey A. Hoffman, fourth flight, F. Story Musgrave, M.D., fifth space flight; and Thomas D. Akers, third space flight.
During this flight there were five EVAs (“space walks”) conducted to service and upgrade Hubble. EVAs 1, 3 and 5 were performed by Musgrave and Hoffman, while 2 and 4 were carried out by Thornton and Akers. The duration of these EVAs were between 6 hours, 36 minutes and 7 hours, 54 minutes.
Endeavour landed at the Shuttle Landing Facility (SLF), Kennedy Space Center, at 05:25:33 UTC, 13 December 1993. The duration of the mission was 10 days, 19 hours, 58 minutes, 37 seconds.
© 2016, Bryan R. Swopes