Sound in Space?

We see large, loud space explosions all the time in movies and TV shows.  Is this real or an astronomy misconception?  As you can predict, most of the great action scenes in movies are fake and do not accurately follow correct science.  Take loud explosions in space.  As cool as it appears in the movies, there is no sound in space.  Sound needs a medium for sound waves to propagate (move) from point A to point B.  The medium on Earth is Earth's atmosphere.  It's the air around you that allows someone you're talking to able to hear you.

Consider striking a tuning fork producing a sound wave.  The tuning fork vibrates at some frequency.  The fork pushes air molecules away which them push other air molecules away and so forth.  Without air molecules, nothing is pushed, and nothing happens.  No sound is produced.  

Thus if you are in space and yell to someone (not through a radio, that's different), they can see you yelling, but can't hear you.  This means that big explosions in space produce no sound.  Makes for a more boring movie, but a more scientifically correct movie.