I really like the thought and implementation of immersion details and would like to suggest some further improvements.  

Gas giants, like Jupiter have huge storms, would like to see a variety of storm effects along with sounds when viewing planets up close.  

Lava planets could have sound effects and rivers of moving lava on them.  Volatile eruptions from volcanoes the size of continents.

Also there is a lack of attention given to Suns.  These little beauties are the comer stone of cosmic development.  Might we see a animated close up of system sun along with detailed descriptions for educational purposes  and lore details. Some suns could be constructed suns littered throughout the galaxy.  Please give your suns a little love and attention.