Spent some time tonight working on comets and the Comet detail screen. Below is my current layout for it. I plan on adding some more information other than monopole density, but need to do some more game design around that first.
Currently comets are not seen on the star system map unless you've discovered it or bought the discovery from someone else. To discover a comet you'll need to be within one square of it when you perform a scan.
I'm toying with the idea of having comets also provide small amounts of He3 along with magnetic monopoles. This will make them a bit more interesting.
I'm really toying with an idea of having comets have periods in which they disappear and reappear from the system map. I need to game that idea out some more and see how it's going to work. Currently I don't have ships orbit a comet to interact with it, but may consider changing that. My only issue there is that it may give ships a sort of hidden base to orbit where other ships can't see them.