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Portrait of John Glenn
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Courtesy of NASA

John Glenn

John Glenn is an American astronaut who was born on July 18,1921, in Ohio. Before he became an astronaut, John Glenn served as a fighter pilot in World War II and the Korean War.

John Glenn became an astronaut in 1959.

Glenn became the third American in space in 1962. He flew aboard the Mercury 7 spacecraft. He became the most famous astronaut of all time.

Glenn left NASA in 1964. He became a U.S. Senator for Ohio in 1974. He participated in a final mission in 1998 at the age of 77. It studied the aging process.

Last modified January 28, 2005 by Randy Russell.

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part is sponsored in part through grants from federal agencies (NASA and NOAA), and partnerships with affiliated organizations, including the American Geophysical Union, the Howard Hughes Medical Institute, the Earth System Information Partnership, the American Meteorological Society, the National Center for Science Education, and TERC. The American Geophysical Union and the American Geosciences Institute are Windows to the Universe Founding Partners. NESTA welcomes new Institutional Affiliates in support of our ongoing programs, as well as collaborations on new projects. Contact NESTA for more information. NASA ESIP NCSE HHMI AGU AGI AMS NOAA