http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?f7-type%3DPhotographic;f5-subject%3DObservatory%20(space-based);f4-associated-Lesson%3DX-Ray%20History;f6-subject%3DSputnik%201 Results for your query: f7-type=Photographic;f5-subject=Observatory (space-based);f4-associated-Lesson=X-Ray History;f6-subject=Sputnik 1 Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/Sputnik_Satellite/Sputnik_Satellite.dc.xml The Sputnik 1 satellite, shown here on a rigging truck in the assembly shop, was successfully launched and entered Earth's orbit on October 4, 1957. Sputnik shocked the world, giving the Soviet Union the distinction of sending the first human-made object into space and placing the United States a step behind in the space race. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/Sputnik_Satellite/Sputnik_Satellite.dc.xml Thu, 01 Jan 1970 12:00:00 GMT