http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?f33-instrument%3DROSAT Results for your query: f33-instrument=ROSAT Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/misc_gx5-1_moon/misc_gx5-1_moon.dc.xml This image of the Moon in X-rays was made in 1991 using data from the Roentgen Satellite (ROSAT), an X-ray observatory. In this picture, pixel brightness corresponds to X-ray intensity. The Moon reflects lower energy X-rays (shown as red) from the Sun. The source of high energy X-rays (shown as yellow) is a distant binary star system. The background is speckled with X-rays from many distant, powerful active galaxies. The picture also shows the Moon passing in front of of and obscuring the binary star, a phenomenon called occultation. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/misc_gx5-1_moon/misc_gx5-1_moon.dc.xml Tue, 01 Jan 1991 12:00:00 GMT