This exposure ran for 63 minutes leaving a circular pattern of star trails behind the pattern of aspen branches. The North Star is the center dot of the star wheel.
This night exposure in the Colorado San Juan Mts. ran all night long for 6 hours and 45 minutes. The moon shows in the upper left hand corner and provided the illumination for the landscape. Stars appear as streaks in the pattern of a rainbow.
One may wonder how there could be enough light to record this at night but the math shows that this image is 1,537,500 times longer than the average 1/ 125 of a second daytime shot........
