I think You should focus on informations that are hard to get through the ingame interface.

Avoid putting information that can easily change - out of date info is worse then none.



I like the idea of listing events connected with the planet :)

very nice, like it. I am not very good at wiki stuff. If someone could do that for all the planets in time that would be awesome.

That is pretty cool. Can't think of anything really more you can add.