An asteroid that's likely as big as several football fields will fly past Earth next week:

http://www.foxnews.com/story/0,2933,325345,00.html

Also, pay attention to the activity on the sun whenever that comet goes by. If there is any kind of CME or solar flare, that could peel back our magnetic field of prtection against these kind of things and allow some bits of the tail and some of the 'plasma sheild' to enter our atmosphere.