The recent approval by the U.S. Federal Communications Commission (FCC) of a giant space mirror to test 'sunlight on demand' has sparked a heated debate. While the idea of harnessing solar energy is appealing, the implications of this decision are far-reaching and complex. In my opinion, this development highlights a critical juncture in the evolution of space exploration and the need for a more nuanced approach to regulating emerging technologies. The FCC's role in authorizing the use of radiofrequency spectrum for this project is a double-edged sword. On one hand, it showcases the agency's willingness to embrace innovation and explore new frontiers. On the other hand, it raises concerns about the potential risks and consequences of this technology, particularly in the realm of astronomy and environmental sustainability. What makes this situation particularly fascinating is the clash between the promise of clean energy and the potential for unintended consequences. The concept of 'sunlight on demand' is an intriguing one, but it is essential to consider the broader implications. The proposed mirror, Earendil-1, will reflect the sun's rays back to Earth, covering an area five kilometers wide and requiring repointing every four minutes. This raises a deeper question: How do we balance the pursuit of technological advancements with the preservation of our natural environment and the well-being of all living beings? The FCC's decision to approve this project without fully addressing the concerns of astronomers and the public is a cause for concern. The potential for flashes during mirror repointing to disrupt pilots and drivers, as well as the impact on circadian rhythms of plants, animals, and humans, cannot be overlooked. Moreover, the environmental costs of building, launching, maintaining, and burning satellites in Earth's atmosphere are significant. The idea of using Earth's atmosphere as a crematorium for tens of thousands of satellites is a stark reminder of the unintended consequences of unchecked technological progress. The FCC's role in evaluating non-radio effects, including orbital safety, is crucial but may not be sufficient. The agency may not have the required expertise to fully assess the potential risks and consequences of this technology. It would make sense to move some of this evaluation to the U.S. Office of Space Commerce, but recent budget cuts make that infeasible. Consequently, the FCC will soon be asked to judge a daunting range of satellite proposals, including a cluster of ideas to gather solar energy from space. One idea is to send solar power down to Earth through high-energy beams, which could change atmospheric chemistry and harm wildlife. The environmental costs of these projects, including the construction, launch, maintenance, and disposal of satellites, are often overlooked. The solar energy generated is only clean if we ignore these costs. The FCC's decision to approve this project without fully addressing the concerns of astronomers and the public is a cause for concern. The potential for flashes during mirror repointing to disrupt pilots and drivers, as well as the impact on circadian rhythms of plants, animals, and humans, cannot be overlooked. The majority of satellites in orbit today are American, and the main federal agency regulating satellites is not set up to do that well. We are now seeing the consequences of this oversight. While outer space is effectively infinite, low-Earth orbit is not. Satellites orbit the Earth around once every 90 minutes, increasing the collision potential between objects in orbit. The many satellites and rocket bodies that have burned up in Earth's atmosphere have already measurably altered it. Preliminary studies show that using Earth's atmosphere as a crematorium for tens of thousands of satellites will have devastating effects on ozone and other atmospheric chemistry. Astronomy is also under threat from some of the 'weirder' ideas like space mirrors, solar sails, and diffuse sky brightening from orbital debris. In conclusion, the approval of the giant space mirror to test 'sunlight on demand' is a wake-up call. It highlights the need for a more nuanced approach to regulating emerging technologies and the importance of considering the broader implications of our actions. As we continue to explore the possibilities of space, we must also be mindful of the potential consequences and strive to create a sustainable and harmonious future for all.
