is it possible to determine which galaxy is m...

# Explanation: ## Step1: Recall Doppler - effect principle The Doppler - effect for light shows that the shift in spectral lines (red - shift or blue - shift) is related to the motion of the source (galaxy). A larger shift indicates a higher relative velocity. ## Step2: Analyze the spectral lines By comparing the amount of shift of the spectral lines of each galaxy with respect to the spectral lines of our galaxy, we can determine the relative velocities. The greater the shift of the spectral lines from their rest - wavelengths (as seen in our galaxy's spectrum), the faster the galaxy is moving. If we can measure the magnitude of the red - shift or blue - shift for each galaxy, we can rank them according to their speeds. # Answer: Yes, it is possible. By comparing the magnitude of the shift of the spectral lines of each galaxy relative to the spectral lines of our galaxy, we can determine which galaxy is moving the fastest as the amount of shift in spectral lines is related to the relative velocity of the galaxy.