http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?expand%3Dsubject;f1-subject%3DInstrument;f2-associated-Lesson%3DX-Ray%20Science Results for your query: expand=subject;f1-subject=Instrument;f2-associated-Lesson=X-Ray Science Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/MIT-Clark-Kraushaar-1956/MIT-Clark-Kraushaar-1956.dc.xml Professors William Kraushaar and George Clark close the air-tight cover on the balloon gondola that carried the second of their two (unsuccessful) balloon experiments in search for high-energy cosmic gamma rays. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/MIT-Clark-Kraushaar-1956/MIT-Clark-Kraushaar-1956.dc.xml Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/chandra_labeled/chandra_labeled.dc.xml Renamed the Chandra X-ray Observatory after launch, this image shows the instruments onboard the observatory. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/chandra_labeled/chandra_labeled.dc.xml Thu, 01 Jan 1970 12:00:00 GMT