http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?expand%3Dsubject;f1-subject%3DConcepts;f2-subject%3DElectromagnetic%20spectrum Results for your query: expand=subject;f1-subject=Concepts;f2-subject=Electromagnetic spectrum Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/EMS-penetration-atmosphere/EMS-penetration-atmosphere.dc.xml Only visible, radio, and some infrared radiation penetrates the atmosphere. Ultraviolet photons, X-rays, and gamma rays do not. While observations at any wavelength benefit from instruments in space, detection of celestial of ultraviolet, X-ray, and gamma-ray sources require instruments in space. The development of rockets led to our ability to place these special instruments in space. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/EMS-penetration-atmosphere/EMS-penetration-atmosphere.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/fig-26-ems-big/fig-26-ems-big.dc.xml Scale illustrating the order and size of the wavelengths in each band of the electromagnetic spectrum. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/fig-26-ems-big/fig-26-ems-big.dc.xml Thu, 01 Jan 1970 12:00:00 GMT