O and before anybody tells the author of the above article to "read a basic book" here is a little bit about her....
Leslie Wickman, Ph.D., is the Director of the Center for Research in Science (CRIS) at Azusa Pacific University (APU). She is an internationally respected research scientist, engineering consultant, and inspirational speaker.
For more than a decade Wickman was an engineer for Lockheed Martin Missiles & Space, where she worked on NASA's Hubble Space Telescope and International Space Station Programs, receiving commendations from NASA for her contributions and being designated as Lockheed's Corporate Astronaut.
She currently also works part-time as a research scientist with government think tanks on technical and political aspects of national aerospace and defense issues. Some of her recent projects include climate change research, assessment of future human spaceflight missions and technologies, human factors problems for extreme environments, fighter pilot proficiency training, and sustainable water reclamation and agriculture.
Dr. Wickman has lectured around the world on satellite servicing, spaceflight physiology, astronaut training and operations, as well as various topics in astronomy, environmental stewardship, and the interface between science and theology.