SpaceX’s Starlink satellites have been controversial since before the first round of them were launched. Having recently launched more, which is going to keep happening for a while, the debates have sparked up again. There are currently 422 of the anticipated 12,000 (with 30,000 more applied for) Starlink satellites floating around our planet, and they’re already upsetting people.
The two main reasons (if we remove all the tinfoil hat conspiracies) are that they will ruin our view of the night sky, which really sucks for astrophotography, and that it will make certain scientific studies all but impossible due to their overpowering brightness relative to the dim lights littered throughout the universe. Elon Musk has now said, though, they’re working on making them dimmer.