I'm working on an enhancement to the HUD, of which I'm thinking of maybe making it a purchasable item (but this would only work with my HUD). It basically renders out information about the current system in the top left corner all the time, plus, it shows you the current nearest entity. It does so by calculating the distance to every entity in space, and then display that info.
Security is based on the political situation such as Democracy which has a number, and multiply that by 0.125 - since we have 8 ideologies. Interstellar space sets that value to 0. The higher that value, the "safer" the system *might* be.
It's not yet complete, it's missing travel info such as your next jump and how much time that will take (it's accessing route information).
Here's how it looks so far: