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* -{[http://www.nps.gov/history/NR/twhp/wwwlps/lessons/101space/101space.htm "America's Space Program: Exploring a New Frontier", a National Park Service Teaching with Historic Places (TwHP) lesson plan]}-
* -{[http://spacephotos.ru/ The Soviet-Russian Spaceflight's History Photoarchive]}-
* -{[https://web.archive.org/web/20101227233620/http://www.life.com/image/first/in-gallery/30222/the-21-greatest-space-photos-ever The 21 Greatest Space Photos Ever] – slideshow by ''Life Magazine''}-
* -{"[http://www.phy6.org/stargaze/Sintro.htm From Stargazers to Starships]", extensive educational web site and course covering spaceflight, astronomy and related physics}-
* -{[https://www.youtube.com/watch?v=e7DEw70LVWs ''We Are The Explorers''], NASA Promotional Video ([http://www.nasa.gov/home/hqnews/2012/mar/HQ_12_071_We_Explore_Video.txt Press Release])}-
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