The star clusters for exploration is a nice touch to the game.
But right now they feel very empty and lonely, and here are a few suggestions on how to improve them.
1.) Add background music please!!!
2.) For unexplored systems, add a generic planet or star model instead of just a tag pointing to nothingness.
2.) As before, replace tags with visual objects for the other anomalies(samples et), I.E asteroids, derelict ships, comets, planetoids, gas clouds etc.
Just a few suggestions on what i think could go a long way to making the exploration sectors a little more pleasent to visit.