The roughly 150 Dark Sky Places in the U.S. fall into five International ... This remote area, with a population of only about 800, has one of the darkest skies in Nevada. It is located within ...

and the twilight sky brightness. The darkest sky brightness is about 19.0 and 18.6 mag arcsec-2 in V and R band, respectively. An obvious darkening trend is found at the first half of the night at WHO ...