VerifiedNews's video: Galactic Rotation Anomaly Time Dilation Not Dark Matter Galaxies Non-Simultaneous Objects

Gravity wells and velocity slow time. Earth is out on a spiral arm, giving us simultaneous time flow with other objects in spiral arms, and the outer spirals themselves. Gravitic and speed based time contraction will result in lower observed light levels from galactic centers, which, due to gravity and velocity (orbiting objects closer to center mass) would be dimmed (if time running 50% slower there, the light emanated in one day would arrive here over a two day period), so estimates of mass based on brightness would be in error and too low. Question solved tidily. WMAP microwave mapping, Hubble Telescope Observations, Hubble Constant Applied, Big Bang, Relativity, Relativisic Velocities, Objects moving faster than light, Black Holes, Expansion of Space, Dilation of Time, Infinite Mass, Translight galactic velocity