Helping Astronomers Collect More Accurate Images of the Sky The brightness of stars and galaxies seen through a telescope can vary from day to day because of atmospheric variability. The sky's inconsistency is due to the presence of atmospheric aerosols -- seen as haze -- that scatter and absorb some of the light from the stars and distort what is seen through the telescope. To address this problem, researchers at the Georgia Tech Research Institute (GTRI) developed a device to accurately assess the impact of this variability on light travelling through the Earth's atmosphere. The tool was developed in collaboration with the University of New Mexico and supported by the National Science Foundation.