US approves controversial satellite to reflect sunlight onto Earth at night

The United States has granted approval for the launch of 'Eärendil-1', a satellite designed to reflect sunlight onto the night side of Earth. The project, which has sparked debate, aims to illuminate nocturnal landscapes artificially. Critics question the environmental and cultural implications of turning night into day, raising concerns about light pollution, ecological disruption, and the loss of natural darkness. The satellite's name references a star from J.R.R. Tolkien's legendarium, symbolizing light in darkness. The approval marks a significant step in space-based geoengineering, with potential impacts on astronomy, wildlife, and human circadian rhythms. The article from Süddeutsche Zeitung explores the stakes of this technological intervention, framing it within broader discussions about humanity's relationship with the night sky.