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Learn about planets outside our solar system through Exoplanets and Alien Solar Systems by Tahir Yaqoob, Ph.D., a book in our online store book collection.

Mark Brown

Mark Brown is an American astronaut who was born on November 18, 1951 in Indiana. Before he became an astronaut, Brown was a pilot for the Air Force.

Brown began working for NASA as an aerospace engineer in 1980. In 1985, he became an astronaut. He has logged 249 hours in space from two spaceflights.

In 1989, Brown flew aboard STS-28 in a Department of Defense mission. In 1991, Brown helped deploy the Upper Atmosphere Research Satellite aboard shuttle Discovery.


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Learn about Earth and space science, and have fun while doing it! The games section of our online store includes a climate change card game and the Traveling Nitrogen game!

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Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF