If you really want to mess with your head look at the below:
Those lights appearing not to move in the night sky we are told are in geostationary orbits.
They have never been recorded in history despite many civilizations meticulously documenting their observations of the heavens. Not one mention of them until we are told those satellites were launched.
Then you could google Iridium satellites. One of the brightest things in the night sky under the right conditions. Never observed until we are told they were put into orbit.
If anyone is really interested they could take advantage of the doppler effect. Use it to track satellites and determine altitude and velocity.
The ISS can be observed with binoculars and you will be able to resolve the solar panels. It will be somewhat blurry, but you will notice it really seems to be a man made object up there.