Tuesday, June 18, 2013

Halley's Comet



Halley's Comet or Comet Halley (/ˈhæli/ or /ˈheɪli/), officially designated 1P/Halley,[2] is the best-known of the short-period comets and is visible from Earth every 75–76 years.[2][10] Halley is the only short-period comet that is clearly visible to the naked eye from Earth, and thus the only naked-eye comet that might appear twice in a human lifetime.[11] Other naked-eye comets may be brighter and more spectacular, but will appear only once in thousands of years. - http://en.wikipedia.org/wiki/Halley%27s_comet

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