A Triumph of Math, Science, Technology and Engineering
The 1961 launch of Yuri Gagarin into orbit -- the birth of human spaceflight -- was a significant event for all peoples More »
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Dr. Paul H. Knappenberger is president of Adler Planetarium & Astronomy Museum in Chicago, America's first planetarium. He is a member of the American Astronomical Society, the International Planetarium Society, and regional planetarium associations.
The 1961 launch of Yuri Gagarin into orbit -- the birth of human spaceflight -- was a significant event for all peoples More »
