This quarter-inch diameter chip was photographed by British astronaut Tim Peake from inside the Cupola module of the International Space Station. Alarmingly, it’s actually in one of the windows.
Caused by a space debris impact, it’s not a big crack nor could it do any harm to the multi-layered station window—but it’s still not a nice thing to see when you’re in orbit. It was probably caused by “a paint flake or a small metal fragment no bigger than a few thousandths of a millimeter across,” according to the European Space Agency.
that's what happens when you follow too closely behind a space rock hauler
~rimshot~
Safelite repair, Safelite replace!