On my way home last evening, as the Moon was visible, I ran a little experiment to measure the linear diameter of the Moon and see if the illusion I have been talking in a previous post was real. Putting my hand around the moon at arms reach (probably less than 55cm aways from my eyes) I then enclosed the moon between my thumb and index Finger. You'll be not surprised that the distance between my two fingers was indeed around 0.5cm! Amazing eh? No? Well, yeah ... okay.