The midnight Sun shines over Lake Colleen at Deadhorse (Prudhoe
Bay), Alaska, on July 7, 2007. The Sun is still so far north that
it stays up for 24 hours a day, which is possible only above the Arctic
Circle. It will finally set later in the month as it moves to
the south. A latitude here of 70.2 degreees north gives an actual
solar (center) elevation of 2.9 degrees, which is raised to 3.2
degrees by atmospheric refraction.
Copyright © J. B. Kaler.