Starship Asterisk*

I concur with Iron Sun's concise reply that arrived just before my own ramblings. The explanation should have confined the comparison to just the central bubble.

To Ann (and others), my thanks for speaking up about your confusion! Misery loves company. I wanted to teach my niece something about optical illusion and perspective, how the brain (mis)perceives dimensions and distance. So, I slowly went line by line through the accompanying explanation using supp...