I wonder if people in the middle ages could clearly recognize the earth's shadow without all the light pollution we have now? I was outside late with a friend under a clear sky last night, and told him about this SSPX article, and the mention of how people centuries ago may have been able to see the earth cast a moving shadow across the sky such that they could tell that the earth is a globe. Only like 5 minutes later he points out some drones. I think to my self, "yeah right, we've only ever seen one drone around here not several". I look up and see a line of Musk's Starlink satellites coming from the west before fading away overhead into the earth's shadow.
That is another real life experience proof for me that the earth is a globe. How do you keep weather balloons in a perfectly straight line and moving so fast at such a high altitude?