With my fairly sketchy knowledge of relativity, one of the basic assumptions is that you can't tell who's point of view is right, with regards to how thing are moving. But, in the case of rotation, isn't it possible to tell if you are rotating by observing the coriolis effect? For instance, when a rocket is launched, it seems to curve as we rotate away from it, but it wouldn't do this if we were not rotating. Surely this shows that we are rotating. Does the 'not knowing who is moving' rule apply to rotation, or does this somehow not violate it? Thanks.