Yes, but Alderaan is a planet, probably Earth-size. The Death Star isn't even twice the diameter of Los Angeles, and it's a hell of a lot less dense. It's nothing like having another planet collide or near-impact, and it's really not the same as having sound in space. The sound is there for the benefit of the audience watching a movie, it is not presented as being present within the text. There is no suggestion that the laws of physics operate differently in this galaxy, and why would they? Technology is one thing, physics is another. Just because Star Wars is a fantasy, a space opera, doesn't mean it abandons all scientific knowledge. If it did that, the audience wouldn't be able to understand the universe it's in. I think having what is, for all intents and purposes, just a big space station cause some sort of gravimetric influence is over the top.

Anyway, the ultimate consideration is whether it works in the scene, and for the reasons I mention above and the interruption of momentum, it doesn't.