Surely you have ever seen images of the Earth seen from space, and in all those photos you see something like this:
The interesting thing about this matter is that all of these are recreations of how it should look. It actually looks like this:
Obviously the satellites are not all white, nor do they shine as bright, but in both the images below and the one above, the satellites visible from this angle are highlighted in this color.
Currently the most complicated part of traveling to space is having to do so many calculations when launching a rocket. If something were to go wrong and hit one of these 19,500 satellites and debris in orbit, it could create an unprecedented problem.