Yet despite this knowledge, light pollution has been challenging to document, especially on a global scale. But now, a new study shows that light pollution is rapidly worsening.
The analysis comes from Globe at Night, a citizen science program run by the National Science Foundation's NOIRLab. The study concludes that stars are disappearing from human sight at a stunning rate. By relying on the observations of sky-gazers across the globe, the researchers found that light pollution has had much more of an impact than indicated by satellite measurements.
From the glimmering swath of our home galaxy, the Milky Way, to a multitude of constellations, the human eye should be able to see thousands of stars on a clear, dark night. Yet thanks to light pollution, 80% of people in the United States can't even see the Milky Way swirl of our galaxy anymore.