I have such a problem regarding that self destruct. It only blew up like a third of the saucer section of the ship. If it wasn't in a gravity well at the time, it'd have just floated in space. The planet's atmosphere did more to destroy it than the ship's own self destruct mechanism. That's not a very good system if the intent is to make sure the ship can't be salvaged.My wife use to laugh at me because she had nevre seen me cry at a movie, but when the Enterprise blew up in Star Trek three I made a audible YELP!