Letters from the June 18, 2005, issue of Science News | Science News



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Letters to the Editor

Letters from the June 18, 2005, issue of Science News

10:03am, June 14, 2005

Road worriers

"Navigating Celestial Currents: Math leads spacecraft on joy rides through the solar system" (SN: 4/16/05, p. 250) gives the casual reader the distorted view that one could travel the solar system at will by using these methods. These are generally small perturbations on the much larger primary propulsion requirement that is fixed by standard two-body orbital mechanics.

John Oldson
San Diego, Calif.

In the course of its eccentric orbit, the moon moves through the mean positions of the Earth-moon L1 position. Maintaining a space station at L1 would be a dubious proposition.

David R. Burwasser
Oberlin, Ohio

Bright ideas

In "Mood Brighteners: Light therapy gets nod as depression buster" (SN: 4/23/05, p. 261), the use of light therapy was shown to fight depression. I would suggest consideration of the po

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