are their orbits and trajectories computed ahead of time to avoid collisions?

Seeing them "slowly" move (but in reality incredibly quickly) reminds me of reading https://en.wikipedia.org/wiki/Orbital_(novel)

If you zoom in you can see them moving. Click on them to see their tracks. I'm surprised how random the orbits seem. It's too cloudy at the moment but maybe on a clear night I can check the accuracy by looking up.

cool site! i appreciate satellite trackers and sometimes leave satellite.love up in the background in orbit mode with the music on at home.

the geosynchronous satellites fall on and bounce off earth