sky mirror

upper fort mason

The color of the sky varies depending on the density of the atmosphere. Sunlight from the horizon travels through about 38 times more air than light streaming down from the zenith. Sky Mirror allows visitors to compare patches of sky from different altitudes, revealing the surprising range of shades and hues in what often seems a uniformly blue dome.


This project is supported by the National Science Foundation under Grant No. ESI-0104478. Any opinions, findings and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect those of the National Science Foundation.