http://www.rssboard.org/rss-specification 720 http://ecuip-xtf.lib.uchicago.edu/xtf/search?f5-subject%3DObservatory%20(space-based);f4-associated-Lesson%3DGamma%20Ray%20Impact;f6-type%3DPhotographic;f7-subject%3DVela%205b Results for your query: f5-subject=Observatory (space-based);f4-associated-Lesson=Gamma Ray Impact;f6-type=Photographic;f7-subject=Vela 5b Thu, 01 Jan 1970 12:00:00 GMT http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/vela5b_5/vela5b_5.dc.xml The Vela satellites provided much information useful to astronomers studying gamma radiation from space. Other Vela satellites operated for approximately one year, but Vela 5b was in service for more a decade, from 1969 to 1979. http://ecuip-xtf.lib.uchicago.edu/xtf/view?docId=grxr/vela5b_5/vela5b_5.dc.xml Thu, 01 Jan 1970 12:00:00 GMT