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Sky & Telescope December 2010 Print Issue
If astronomers found a sizable asteroid on a collision course with Earth, what could we do to prevent a catastraphic impact? The good news is that high-level scientists have put a lot of thought into this question, and have conceived a number of possible techniques to avoid disaster. Dan Durda, a leading planetary astronomer and asteroid expert, describes the pros and cons of various types of missions for intercepting asteroids and changing their trajectory. Other articles discuss the December 20-21 lunar eclipse, 20 binocular highlights for light-polluted skies, how to use filters to take great images of galaxies and nebulae, and a review of Meade's new "smart" Go To 8-inch LightSwitch telescope.
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