thousand miles southeast of moscow. it's february 15th, 2013, and the sun rises at 9:17 a.m., but minutes later, something very different is lighting up the sky. >> compared to the sun at that point, it was like way brighter than the sun. it was like turning on a light bulb for the entire earth at that moment. >> it's literally parts of the sky look like it's on fire. >> no one knows what they're seeing yet, but its force is captured on several security videos, cell phones and dashboard cameras. >> what is this thing in the sky? is it a plane? is it a planet? is it going crash and hit us? is it an alien? >> this isn't an alien but it is from outer space. a meteor is hurdling toward earth at a frightening speed. >> it's going about 40,000 miles per hour. >> [ bleep ]. [ speaking a foreign language ] >> [ bleep ]. [ bleep ]. >> that's more than 50 times faster than the speed of sound. and scientists estimate that the meteor weighs 10,000 tons. that's heavier than four space shuttles.