Two galaxies on opposite ends of the universe are moving away from the EarthEach has a velocity 200m / s relative to the EarthHow fast would an observer in one of those see the other galaxy moving away point )
Since the galaxies are moving away from the Earth and are on opposite ends of the universe, their relative motion is determined by the expansion of the universe. The velocity of one galaxy relative to the other can be calculated using the formula:
Relative velocity = Velocity of galaxy 2 - Velocity of galaxy 1
In this case, both galaxies have a velocity of 200m/s relative to the Earth. So, the relative velocity between the galaxies would be:
Relative velocity = 200m/s - 200m/s = 0m/s
Therefore, an observer in one galaxy would see the other galaxy as not moving away at all (relative velocity of 0m/s).