If you look at the sky on a clear night without much light pollution, it’s pretty amazing how many satellites you see orbiting the earth. They travel at many different speeds, smoothly traversing the constellations. And I suspect there are hundreds (thousands?) more satellites that are too small to see with the naked eye.
This used to be the stuff of science fiction… I’m relatively young, but I remember there being far less movement in the night sky when I was a kid. It seems we have truly entered the space age, after all.