Ships are amazingly detailed and the planets surfaces are huge and look spectacular. Night and Day effects take place along with thunderstorm,snowstorm,and sandstorm effects too. Gas giants like jupiter will have multiple cloud layers,acid rain,and lightning. In space planets look to scale to stations and other ships. You can just imagine how big the planet would look on screen.
Sound is awesome.
Explosions are loud and sound different according to if your in space or on a planet. Engines sound just like any Star Trek engine would along with commlink chatter whether it be an officer reporting to you the ships status or a pilot telling you of hostiles in the region or the on-board computer giving you the clearance to dock with a station.