Nasa says 50m-wide asteroid will be nearer to Earth than satellites but miss, noting that rocks hit planet every dayAnyone happening to glance towards the heavens in a week's time and glimpse an 50-metre-long lump of rock hurtling ominously through the skies need not panic.Although it will pass closer to us than any asteroid has for the last 15 years – closer even than the TV satellites that girdle the planet – Nasa insists that 2012 DA14 will miss the Earth by a good 17,100 miles (27,520km)."No Earth impact is possible," said Donald Yeomans, an astronomer with the US space agency.He also ... Read More