Friday's Lunar Event Happens Once In A Blue Moon
Don't miss Friday's blue moon. You won't get a chance to see another until 2018.By Ryan Biek | July 30, 2015
Look up at the sky Friday night, and you'll see a moon so rare, it lives up to that old saying.
Okay, so you won't actually see a blue moon Friday night — more like a whitish-gray one.
Still, it's pretty rare. If you miss this year's, you won't see another until January 2018. While each month usually has only one full moon, a blue moon is a second, sneaking its way in.