CGRO Launch
![Compton Gamma Ray Observatory Launch](/docs/cgro/images/cgro/gro_launch.gif)
On April 5, 1991, the 17 ton Compton Gamma Ray Observatory was carried into orbit by the space shuttle Atlantis (shuttle mission STS-37). After a flawless lift off from Kennedy Space Center, Atlantis deployed the sophisticated satellite observatory, in an orbit 450 km above Earth.
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