Armageddon asteroid Apophis could crash into Earth in 2036, killing millions and causing chaos worldwide, Russian scientists say. The 300-meter-wide asteroid is traveling at 37,014 kilometers per hour. If it passes through a narrow gravitational keyhole in 2029, it would hit the Earth seven years later. NASA, however, says the chances of Apophis hitting the Earth are 1250,000. And if it were on course to slam into the planet, NASA would knock it off course — 'Deep Impact'-style.