This is the definition of "too close for comfort." On Monday, an asteroid the size of three football fields is going to pass near Earth without hitting the planet. The rock, called 2000 EM26, is traveling at 27,000 mph, but won't get closer than 8.8 lunar distances from us. Researchers say that previously unknown asteroids affect Earth only about once a century. You can watch the asteroid's path livestreamed on YouTube starting on Monday night.