Not trying to cause any panic here, this actually happens much more commonly that you think.
There’s an Asteroid heading our way, and it’s a pretty decent size, for a rock. In the grand scheme of things it’s miniscule, but if it were to hit the earth, it would still cause a significant amount of destruction. It’s about 2,000 feet wide, and will sail right past earth on Wednesday, April 19th at more than 1.1 million miles away. For those of you keeping track, that’s about 5-times the distance from the earth to the moon.
Here’s a handy little animation showing it’s projected path:
It’s called 2014-JO25, after being discovered in 2014. NASA says that this is the closest pass of a “really big one” since 2004 when a rock that was about 3.1 miles passed by us, but only at about 4 times the distance from earth to moon. The surface of 2014-JO25 is twice as reflective as our moon, and you’ll actually be able to see it in the night sky as it passes, or you can watch it online.
Check here for the details of how to watch, and for some more info about the asteroid.