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Undergraduate devises strategy for defending Earth from cometary impacts

18 November 2016 Astronomy Now

Qicheng Zhang is an undergraduate astrophysics major at UC Santa Barbara. A recipient of a Thomas R. McGetchin Memorial Scholarship from the Universities Space Research Association, Zhang’s award-winning work demonstrates that a comet could be manipulated to mitigate a potential impact with Earth by heating it with a high-powered laser array.

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Asteroid 2003 SD220 sleighs by Earth on Christmas Eve

24 December 2015 Astronomy Now

During the month of December, the Planetary Radar Group at Arecibo Observatory has observed near-Earth asteroid 2003 SD220, which will make its closest approach to Earth on Christmas Eve. Although designated as “potentially hazardous,” this asteroid will be 28 times further away than our Moon and therefore poses no present danger to Earth.