NASA asteroid tracker: Giant 650FT asteroid is headed for Earth approach THIS WEEKEND A COLOSSAL asteroid twice as tall as Big Ben’s clock tower will shoot past Earth this weekend, NASA’s asteroid trackers have revealed. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Yellowstone volcano: How scientists found magma chamber 'four times bigger than thought’Moon landing: Elon Musk and Jeff Bezos will take us back into space - not NASASolar minimum could lead to ICE AGE ‘No one can predict what will happen next’Moon landing anniversary: Apollo 11 was one of NASA’s greatest achievements, survey findsShark attack: Watch shark swallowed whole by giant sea monster in deep sea feeding frenzyMoon landing: Michael Collins feared he would be a ‘marked man’ if he returned alone