Hubble's Law states that a galaxy's recessional speed is proportional to its distance from us, with no upper limit to this speed. For example, a galaxy 1 megaparsec away recedes at approximately 70 km/s, while galaxies at the edge of the observable universe can recede at speeds exceeding 3 times the speed of light (3c). The term "moves" is misleading; "receding" more accurately describes the behavior of these galaxies, especially since galaxies within the Local Group are gravitationally bound and do not recede.
PREREQUISITESAstronomers, astrophysicists, and students of cosmology seeking to understand the dynamics of galaxies and the expansion of the universe.
You are correct, in principle although not in fact, and there is no upper limit. The objects at the edge of our observable universe are receding from us at about 3c. "Moves" however, is not really the right word to use here, having as it does, the connotation of proper motion, of which there is non in this situation. "Receding" is the right word to use.zuz said:I have read that Hubbles law states that a galaxys speed as it moves away from us is proportional to it's distance. Does this have an upper limit? If a galaxy 1 megaparsec is moving at 70 km/s, a galaxy 10,000,000 mgp away is moving faster then light. Or am I (most likely) mistaken?