Keywords: Hubble-Compton-Spitzer-Chandra Collage.jpg NASA's four space-based Great Observatories were designed to view the universe in different ranges of the electromagnetic spectrum Clockwise from top left Hubble Space Telescope visible light Compton Gamma Ray Observatory gamma ray Spitzer Space Telescope infrared Chandra X-ray Observatory X-ray HST-SM4 jpeg Cartoon CGRO jpg Spitzer- Telescopio jpg Chandra X-ray Observatory jpg 2010-11-13 04 06 UTC HST-SM4 jpeg Ruffnax Crew of STS-125 Cartoon CGRO jpg created by NASA Spitzer- Telescopio jpg created by NASA Chandra X-ray Observatory jpg created by NASA derivative work Adrignola Space telescopes |