Comet watching
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Comet watching (Introduction)
Best time March 12,13 as sun sets:-http://phys.org/news/2013-03-comet-closest-approach-earth.html
Complete thread:
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Comet watching
Best time March 12,13 as sun sets:-http://phys.org/news/2013-03-comet-closest-approach-earth.html
Complete thread:
Comet watching