Thanks to a fluke of orbital mechanics that brings the moon closer to Earth than that it has been in more than 18 years, the biggest full moon of 2011 will occur on Saturday, leading some observers to dub it a "supermoon."

Read more: http://www.foxnews.com/scitech/2011/03/18/supermoon-rises-biggest-moon-18-years-occurs-saturday-night/#ixzz1H30W0zVZ