Did you see the Northern Lights this week? Or did you hear about it afterwards, and wish you knew ahead of time so you could drive out to the boonies in hopes of seeing them? One of my favorite websites is Spaceweather.com. You can sign up on their website to get alerts to the possibility of lower latitude auroras.
Want to know more about how the Northern (and Southern) Lights work? This page from Geophysical Institute at the University of Alaska, Fairbanks does a great job of explaining it to non-scientists.