The rate of human-produced light is increasing in the night sky by as much as 10% per year, making it difficult for astronomers to study the night sky.

Light pollution is encroaching on observatories around the globe – making it harder for astronomers to study the cosmos

Source: space
Source Link: https://www.space.com/astronomy/light-pollution-is-encroaching-on-observatories-around-the-globe-making-it-harder-for-astronomers-to-study-the-cosmos