I’ve watched and rewatched a number of these vids by a retired computer business guy, David Butler, who studied physics and quantum field theory in college 40+ years ago, and put his time in retirement into making some excellent video book series. This in is the final episode in a series called “How Far Away Is it”. I’ve watched it a few times and it just blows me away how big and complex the universe is, as well how we came to learn about it. Check it out and try to not have your mind melt from experience.