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c2013 A1

How To Watch That 'Once-In-A-Lifetime' Comet Swing By Mars

The Huffington Post | Macrina Cooper-White | Posted 10.17.2014 | Science

A comet will be swinging by Mars this Sunday, and eager astronomers say they're ready for the "once-in a lifetime event." Comet C/2013 A1, or 'Sidi...

Newfound Comet May Smash Into Neighboring Planet

Posted 03.05.2013 | Science

By: Joe Rao Published: 03/05/2013 07:37 AM EST on A newfound comet is apparently on course to have an exceedingly close call with the pl...