The Compton Gamma Ray Observatory ( CGRO) launches as the second of NASA's Great Observatories. Compton carries a collection of four instruments, which together can detect an unprecedented, broad range of high-energy radiation called gamma rays.
The observatory was safely deorbited and re-entered the Earth's atmosphere on June 4, 2000.
First spacecraft visits an asteroid
October 29, 1991
This first image of asteroid 951 Gaspra is taken by the Galileo spacecraft from a distance of 16,200 kilometers (10,000 miles) as it flies by the asteroid on its way to Jupiter. The Galileo project's primary mission was the exploration of the Jupiter system (1995-97).