Visual Aids

I don't know how hard/easy it would be to implement, but could you add a visual representation of how far each of the 3 main resources (Culture, Trade, and Force) extends? Like a sorta Number Line setup, with the respective resource highlighting the area till it gets to "x" amount with Culture taking Highlight priority over Trade and that over force. Discovered planets could also be plotted on the Line. Like I said I don't know how hard/easy it will be to implement, but it could help those who can't do math or visualize numbers in their heads. *or are just too lazy*

Graphs
I hope it's okay to add to other people's suggestions, instead of writing a new one - this is basically from the same category.

It would be nice to have some sort of statistics page, that shows us clear and comprehensible graphs/charts of some most important resource productions/usages. Such as, for example, what building is taking up most space or what is using up most of our money (both on pie charts). Wealth-over-time, or other over-time graphs would also be nice, but that is more cosmetic than useful.

Make it Easier to Tell Which Tab You Are Using
It should be easier to tell whether you are working on science or technology, for instance.