That's a good point. I made the mistake of treating the sun as a point light source, which of course it is not! https://www.timeanddate.com/eclipse/shadows.htm

That's a good point. I made the mistake of treating the sun as a point light source, which of course it is not! https://www.timeanddate.com/eclipse/shadows.html https://www.timeanddate.com/eclipse/shadows.html explains the difference clearly.