The Photo Challenge for this month is star circles. Tonight thru Sunday night are perfect for getting the circles without the moon interfering with too much light. Check out this article to learn how to shoot the trails. I prefer the one long shot (An hour or two) but that does allow for a lot of ambient light to lighten the foreground. Make sure to find a very dark location to shoot the circles from. http://www.lightstalking.com/how-to-photograph-star-trails