The Sound of Music

Once someone heard The vibration of the universe As it went bouncing all around And called it sound. Then somewhere farther Down the line Someone heard that sound in time And called it music. In another scant few billion years When the sun is dead and there's No life because no planet left will bear it, That noise, no doubt, will still abound But will make a more forlorner sound. What good is music If no one's around to hear it?