Work Step by Step
Please see the diagram. The solid angle from the opening in the leaves to the image on the "screen" is the same as the angle between the opening and the Sun. The triangular shapes are similar. Just as 100 circular solar images fit between the opening and the screen, 100 suns would fit in the 150,000,000 km that is the distance between the opening and the sun's current position. The sun's actual average diameter is about 1,400,000 km, so this calculation is pretty close!