[Utah-astronomy] How dark can a sky get? (From Erik)

Hi All, This link is an article by Brian Skiff from the Lowell Observatory that gives tips and factors that contribute to dark adaptation (or rather lack of) and influence darkness on a given night. I heard him speak about the subject at the Texas Star Party a few years back. http://www.astropix.com/HTML/L_STORY/SKYBRITE.HTM Erik