The Milky Way Galaxy and the Local Group of Galaxies to which it belongs are moving in reference to the Cosmic Microwave Background at the speed of 630 km/second (1.4 million miles per hour). In a paper published in 2017 in Nature Astronomy, a research team headed by Yehuda Hoffman explained that the Milky Way Galaxy’s … Continue reading The speed of the Sun’s orbital movement across the Galaxy is about 254 km/s. How fast is our Galaxy moving and does it revolve around something?