It's big (about the size of three football fields) and it's fast (about 27,000mph), and it's zipping by our planet tonight. Earthlings, meet asteroid 2000 EM26. As Space.com explains, the asteroid poses no threat of actually hitting the planet when it flies by at a distance of about 2 million miles. But it should put on a nice show, which can seen via live webcast at Slooh starting at 9pm Eastern. Space.com also is hosting a live webcast.