I believe the dust was always moving showing that the Ghost was Murphy's all along.
The Question and Answer section for Interstellar is a great resource to ask questions, find answers, and discuss the novel.
I believe the dust was always moving showing that the Ghost was Murphy's all along.
They added no sound as they want to make the scene more realistic as theres no sound in space(vacuum).
I think the director is trying to give a sense of realism, that there is no sound in space.