http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?expand%3Dsubject;f5-subject%3DAerobee%20Rocket;f4-associated-Lesson%3DX-Ray%20History Results for your query: expand=subject;f5-subject=Aerobee Rocket;f4-associated-Lesson=X-Ray History Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/Aerobee_Rocket/Aerobee_Rocket.dc.xml The Aerobee was a small, unguided sub-orbital sounding rocket, which is a rocket that carries research instruments. The Aerobees were used for high atmospheric and cosmic radiation research in the United States in the 1950s. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/Aerobee_Rocket/Aerobee_Rocket.dc.xml Thu, 01 Jan 1970 12:00:00 GMT