How Fast Do Galaxies Circle Each Other?

How fast are both galaxies orbiting each other? Is there a NASA reference?
NGC 5256 is a pair of galaxies in its final stage of merging. It was previously observed by Hubble as part of a collection of 59 images of merging galaxies, released on Hubble’s 18th anniversary on 24 April 2008. The new data make the gas and dust being whirled around inside and outside the galaxy more visible than ever before. This image is composed of data gathered with the Advanced Camera for Surveys and the Wide-Field Camera 3. Image credit: ESA/Hubble, NASA

NGC 5256 is a pair of galaxies in its final stage of merging. It was previously observed by Hubble as part of a collection of 59 images of merging galaxies, released on Hubble’s 18th anniversary on 24 April 2008. The new data make the gas and dust being whirled around inside and outside the galaxy more visible than ever before. This image is composed of data gathered with the Advanced Camera for Surveys and the Wide-Field Camera 3. Image credit: ESA/Hubble, NASA

The Milky Way and Andromeda are plunging towards each other, aimed nearly directly at each other, and proceeding at a pace of about 110 kilometers every second. Given the enormous distance between...

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