In order to test for possible micrometeorites impacting a spacecraft, NASA is utilizing a 2-stage light gas gun to simulate potential hazards for future space missions. The test fires a bullet with a speed that is equal to 25 times the velocity of a 44 magnum, or like flying from New York to San Francisco in five minutes.

NASA is currently

Source: Hot Hardware – NASA Performs Dangerous Vacuum Gun Test To Research Space Rock Impact Protection