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Environment
No Zero Gravity in orbit
April 16, 2007
| A version of this story appeared in
Volume 85, Issue 16
April 2, page 62: Spinhenge@home, a volunteer computer project to calculate spin dynamics of magnetic molecules, was spelled incorrectly.
A PICTURE CAPTION in the interview with Mae Jemison describes Jemison "performing experiments at zero gravity on board a space shuttle" (C&EN, March 26, page 39).
One physics textbook states that the force of gravity is reduced no more than 10% on the shuttle in orbit. Gravity holds the shuttle in orbit. Centrifugal force, due to inertia, equal and opposite gravity, makes things in orbit weightless!
James F. Jackson
Carlisle, Ind.
The power is now in your (nitrile gloved) hands
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