Mountain-size 'planet killer' asteroid will make a close approach to Earth today — and you can watch it live Livescience.comTwo large asteroids safely pass Earth just 42 hours apart European Space AgencyTwo Killer Asteroids Are Flying by Earth, and You May Be Able to See One The New York TimesMassive asteroid, size of hundreds of lions, will pass by Earth The Jerusalem PostTwo large asteroids will pass near Earth this week Earth.com