Orbit Overload: Climate Shifts Could Leave Space Junk Lingering

SpaceX has asked for permission to launch up to one million satellites to provide global internet, but researchers warn that an already crowded orbit could become messier as climate-change–driven changes in the upper atmosphere cause space debris to linger longer; by century’s end, only about half as many satellites may safely fit in orbit, even as SpaceX accounts for roughly two-thirds of all satellites launched to date (about 15,000).