Something Very Strange Seems to Be Synchronizing Distant Galaxies
“The observed coherence must have some relationship with large-scale structures, because it is impossible that the galaxies separated by six megaparsecs [roughly 20 million light years] directly interact with each other,” Korea Astronomy and Space Science Institute astronomer Hyeop Lee told the site.
There have been many instances of astronomers observing galaxies that seem to be connected and moving in sync with each other. A study by Lee, published in The Astrophysical Journal in October, found that hundreds of galaxies are rotating in exactly the same way, despite being millions of light years apart.
And a separate study, published in the journal Astronomy and Astrophysics in 2014, found supermassive black holes aligning with each other, despite being billions of light years apart.