A METEOR with the explosive power of TEN cruise missiles has struck the Moon - sparking a massive explosion visible with the naked eye. And terrifyingly the 56,000 mph collision - captured by NASA scientists highlighting the catastrophic danger planet earth faces from similar meteors - was caused by a space rock weighing no more than 88 lbs (40 kilos). Despite the meteor's tiny proportions - about the size of a small boulder and the weight of an average 10-year-old boy - the impact damage was colossal and the explosion shone with the brightness of a magnitude 4 star. A similar strike against a city on earth would create a crater 65feet (20m) deep and create a devastating kill zone equivalent to TEN Tomahawk cruise missile striking in exactly the same place. Experts fear the death toll would run into thousands. Unlike the Moon the Earth has a protective atmosphere meaning most space debris burns up before it can impact. But bigger meteors sometimes get through - most recently at