Great Observatories program

The Great Observatories program is four large, powerful space-based telescopes.  They are a series of satellites placed by NASA.  Each Space observatory has been important to astronomy.

 The Hubble Space Telescope (HST) looks at visible light and near-ultraviolet.  It was launched in 1990. In 1997 ability to look at the near-infrared range was added.  In 2009 there was a mission to service Hubble. 

 The Compton Gamma Ray Observatory (CGRO) looks at gamma rays.  It also looks at some hard x-rays as well. It was launched in 1991.  It was deorbited in 2000.

 The Chandra X-ray Observatory (CXO) looks at soft x-rays. It was launched in 1999.

 The Spitzer Space Telescope (SST) looks at the infrared spectrum. It was launched in 2003.
Category:Telescopes

Category:Astronomical observatories