The Great Observatories

CGROCGRO:The Compton Gamma Ray Observatory (http://cossc.gsfc.nasa.gov/)

The Compton Gamma Ray Observatory examines the universe in gamma rays.
It was launched in April 1991.



Chandra: X-ray Observatory (AXAF) (http://asc.harvard.edu/) Chandra

Chandra will study the universe in x-rays. It is scheduled to be launched in 1999.



HSTHST: The Hubble Space Telescope (http://www.stsci.edu/)

The well-known Hubble Space Telescope, launched in April 1990, was the first of the Great Observatories to be launched. It observes the universe in visible light and ultraviolet light.



SIRTF: The Space Infrared Telescope Facility (http://sirtf.caltech.edu/) SIRTF

SIRTF will look at the infrared universe. It is scheduled to be launched in late 2001.



(Illustrations courtesy of NASA and the National Air and Space Museum)


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