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Nature Portfolio@natureportfolio.nature.com

The number of working satellites has soared in the past five years to around 11,000, mostly because of constellations of orbiters that provide Internet connectivity around the globe, but it comes with a series of problems. Nature explores the issues and how scientists are reacting. 🔭 🧪

go.nature.comSwarms of satellites are harming astronomy. Here’s how researchers are fighting backSpaceX and other companies plan to launch tens of thousands of satellites, which could mar astronomical observations and pollute the atmosphere.