Starlink

In January 2015, Elon Musk (the CEO of SpaceX) announced his plans to build a megaconstellation (a huge group of satellites working together as a system) of satellites in space, to provide fast, cheap internet to people everywhere in the world (and the U.S. military). On the 23rd of May, 2019, SpaceX launched the first 60 Starlink Satellites into space. So far, SpaceX have launched 302 of them, and plan to have 12,000 (he is trying to get permission to launch 30,000 more) satellites in orbit when Starlink is completed. This might sound good, but the satellites are very reflective, and they act like a mirror, bouncing sunlight back towards Earth. They are already starting to effect pictures of the night sky, like in this photo, taken by the Cerro Tololo Inter-American Observatory (CTIO) which was taking a photo of the Magellanic Clouds, which have been teaching us about how stars form.

Cliff Johnson, who works at the CTIO, said that 15 to 20% of the photo was completely lost, but he is most worried about what it will look like when finished. Tony Tyson said that when Starlink is complete it will look like the sky is crawling.