when was the compton gamma ray observatory launched
Compton Gamma Ray Observatory The Compton Gamma Ray Observatory (CGRO) was a space observatory detecting photons with energies from 20 keV to 30 GeV, in Earth orbit from 1991 to 2000. It featured four main telescopes in one spacecraft, covering X-rays and gamma rays, including various specialized sub-instruments and detectors. Following 14 years of effort, the observatory was launched from Space Shuttle Atlantis during STS-37 on April 5, 1991, and operated until its deorbit on June 4, 2000.[3] It was deployed in low earth orbit at 450 km (280 mi) to avoid the Van Allen radiation belt. It was the heaviest astrophysical payload ever flown at that time at 17,000 kilograms (37,000 lb).
New Covent Garden Market Construction began in 1971 on the site of the former Nine Elms Locomotive Works, and the market opened on 11 November 1974.
Babylon Babylon (
Vance Astro Astro first appeared in January 1969 as a founding member of the Guardians of the Galaxy in the partial reprint title Marvel Super-Heroes with issue #18.