These don't really seem to show up on photographs but I am sure they are there. I have been observing planets for years. The following picture is of Saturn with the two bands in the middle. The details of the Northern/Southern Hemisphere are exaggerated in their shading. What are these things and why don't they show up in photos? !
http://www.iceinspace.com.au/forum/a...1&d=1303262390