Earth revolves around the Sun? Let's see. In a twin-star system which one is going around the other? Let's make one of them have higher mass. Did the heavier on

Earth revolves around the Sun? Let's see. In a twin-star system which one is going around the other? Let's make one of them have higher mass. Did the heavier one completely stop going around, or does it still wobble a bit? That wobble mean the heavier one is still going around their common center of mass. Also, since there is no static fixed point in the space, the interpretation of movement of Sun and Earth could be very subjective to the reference frame selected. There is nothing wrong if someone wants to consider Earth as that fixed point for some arbitrary local reference frame. Infact, a lot of calculations that matter to human life on Earth require that.