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.
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 object 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.
10:21 a.m., PST, 14 April 1981: The first space shuttle, Columbia, touches down on Runway 23, Edwards Air Force Base, California, completing the first space flight of the United States’ shuttle program.
With its two-man crew, commander, veteran astronaut John W. Young, and pilot Robert L. Crippen, Columbia traveled 1,074,567 miles (1,729,348 kilometers) on its 37-orbit journey, in 54 hours, 20 minutes, 53 seconds.
11 April 1981, 12:00:03 UTC, T minus Zero: Space Shuttle Columbia (OV-102) lifted off from Launch Complex 39A, Kennedy Space Center, Cape Canaveral, Florida, on mission STS-1, the very first orbital flight of the series of reusable space vehicles. Aboard were mission commander John Watts Young and shuttle pilot Robert L. Crippen.
John Young, a former U.S. Navy test pilot and holder of 21 world flight records, was NASA’s most experienced astronaut. He had served as Pilot of Gemini III; backup pilot, Gemini IV; Commander for Gemini 10; Command Module Pilot on Apollo 10; back-up commander for Apollo 13; Commander, Apollo 16; and back-up commander for Apollo 17. Young retired from the Navy in 1976 with the rank of captain.
STS-1 was Bob Crippen’s first space flight.
On 14 April, Columbia landed at Edwards Air Force Base in the high desert of Southern California. It had completed 37 orbits. The total mission duration was 2 days, 6 hours, 20 minutes, 53 seconds.
Columbia was the second of six orbiters built by Rockwell International at Palmdale, California. Construction began 27 March 1975. It was 122.17 feet (37.237 meters) long with a wingspan of 78.06 feet (23.793 meters) and overall height of 56.67 feet (17.273 meters). At rollout, 8 March 1979, OV-102 weighed 159,289 pounds (77,252.3 kilograms), and approximately 178,000 pounds (80,740 kilograms) with its five Rocketdyne RS-25 main engines installed. At launch, the all-up weight of the vehicle was 219,258 pounds (99,453 kilograms).
Columbia was returned to Rockwell for upgrades and modifications from August 1991 to February 1992. It was overhauled and upgraded again at Palmdale in 1994 and 1999.
STS-1 was the first of 135 missions of the Space Shuttle Program. 28 were flown by Columbia (OV-102). During those flights, Columbia spent 300 days, 17 hours, 40 minutes, 22 seconds in space. It completed 4,808 orbits of the Earth and travelled 125,204,911 miles (201,497,772 kilometers).
Columbia was destroyed 1 February 2003 as it disintegrated during reentry. All seven of the astronauts aboard were lost.