Asteroid WARNING: Space rock packing 560 MEGATON blast power could hit Earth in 2023 AN asteroid measuring 700ft-across and weighing 13 billion tonnes could slam into the Earth with the force of a 560 megaton nuclear bomb as early as August 2023, NASA has warned. Share: Facebook Twitter Google+ Stumble Digg Email ThisBlogThis!Share to XShare to Facebook Related Posts:Finding a New Way to Depict Addiction VisuallyWhat a catch! Fossil evidence of prehistoric shark catching flying lizard MID-FLIGHTWinter Solstice, Full Moon AND Ursid meteor shower will DAZZLE skies tomorrowRescue Highlights Dangers — and Possibilities — at Old Mining SitesJuul Closes Deal With Tobacco Giant AltriaWinter Solstice 2018: How to watch winter solstice, full moon AND meteor shower TOMORROW