The sky. It was about 10 tons and 33,000 miles per hour. It was seen, heard, and felt as windows shattered and the roof of a factory collapsed. All but sought to be caused by the sonic boom. They happen hundreds of times every year but only several times are they actually seemed to fall by people. Very rarely do they do any damage. Really want thousand injured, mostly hurt by flying glass. It hit on the same day that an asteroid, 2012da14, makes the closest recorded past closer to earth they ounce of satellites. They said there was no connection between the two, just a cosmic coincidence. Nbc news, london. That would have been really frightening. Another space event today. An asteroid became the starkly close to earth, 17,000 miles, as it passed by. For scientists, the a flyby is an exciting event. And has been traveling since the formation of the universe. 4. 5 billion years ago. 2012da14 past 17,000 miles from earth. This is in the. Rg3 synchronous weather satellites. This is a histo