They fly above us unseen — some are taking photos of outer space — but the intense network of satellites that orbit Earth in perfect coordination could collapse in just a couple of days, according to a new study. Satellites in low-Earth orbit have increased exponentially in recent years , largely thanks to SpaceX’s Starlink program. In the 1970s, NASA proposed a doomsday scenario where collisions between satellites cascaded to the point that they blunt human activity in space. Known as Kessler Syndrome, it was based on multiple accidents causing a lot of debris. But new research led by Sarah Thiele at Princeton University has found that one of the biggest threats is a solar storm that could cause a cut in communications between satellites and their operators. If the resulting geomagnetic storm did cut comms, the research shows that it could take just 2.8 days before a collision.…