The Global Threat of Light Pollution from Satellites and Artificial Light.

Astronomers have warned that the increasing number of satellites orbiting Earth is causing unprecedented light pollution, posing a global threat to nature and humanity's ancient relationship with the night sky. The congestion of satellites in low Earth orbit increases the risk of collisions and creates space debris that reflects light back to Earth. The brightening of the night sky will affect professional astronomers, major observatories, and cultural heritage. Astronomers have called for limiting mega-constellations and banning them if necessary to protect the natural aspect of a pristine night sky.