zenitshimmljusstyrkan
Zenitshimmljusstyrkan, often translated as zenith sky brightness, refers to the apparent brightness of the sky when viewed directly overhead, at the zenith. This measurement is a crucial parameter in understanding and quantifying light pollution. Light pollution, the excessive or misdirected artificial light, scatters in the atmosphere, making the night sky appear brighter than it naturally would. Measuring zenith sky brightness helps astronomers and environmental scientists assess the degree of skyglow in a particular location.
The measurement is typically expressed in magnitudes per square arcsecond. A darker sky will have a lower
Various instruments, such as sky quality meters, are used to measure zenith sky brightness. These devices quantify