Ratio aspect between Jupiter and its moons

[cimo80]

Looking at the attached picture that show Jupiter and its four biggest moons, it seems the Io, Europa, Ganymede and Callisto have a ratio dimensions about 1:10 with Jupiter.
But Jupiter have a diameter of 140000 km and its moons an average of 4000 km so the real ratio is 1:35.
Why does it happen this illusion?
Thanks.

Simone

 

[billslugg]

Everything has a certain amount of blur around the edges due to the atmosphere , optical imperfections, dirt and reflections on the lenses. It doesn't much affect the size of a large target such as Jupiter but it can dominate a small target such as the moons making them appear much larger than reality.

 

[HarperR]

Hello,


The illusion you are observing in the picture is known as the "size-contrast illusion." It occurs because our brains perceive the relative sizes of objects based on their surrounding context. In this case, when the moons are close to Jupiter in the image, our brains compare their sizes to the much larger planet, making them appear relatively smaller than they actually are. This optical illusion can distort our perception of their true size ratio. PaybyPlateMa Login


If you want more details please tell me.

Best regard,
HarperR