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[[1997]] - – Space Shuttle Discovery is launched on a mission to service the Hubble Space Telescope. <br> [[2003]] – [[NASA]]'s "WMAP" [[satellite]] completes the first detailed cosmic microwave background [[radiation]] map of the universe.:* The image reveals the universe is 13.7 billion years old (within one percent error) and provides evidence that supports the inflationary theory. <br> <br> <noinclude>[[Category:On This Day|042]]</noinclude>