On a clear night, if you fix your gaze on a spot in the sky for a few minutes, chances are you'll witness a satellite passing through. Almost every evening when I am grilling I spot one.

In a previous chapter of my life, I possessed the know-how to employ tools for identifying them. There is a dedicated community of enthusiasts who meticulously catalogs these sightings via a mailing list.

The real fun is when when you chance upon something that is absent from public government records—indicating you've likely stumbled upon a satellite belonging to a government that they don't want to disclose.