Just a couple of years ago, astronomers and astrophysicists were baffled by the observation of a synchronized behavior in galaxies, which can not be explained by their individual gravitational fields. Such was the case of a study lead by Joon Hyeop Lee, an astronomer at the Korea Astronomy and Space Science Institute, and published in The Astrophysical Journal in October 2018, reporting hundreds of galaxies rotating in sync with the motions of galaxies that were tens of millions of light years away.

Given the fact that from our known theories, in principle it would be impossible that galaxies separated by megaparsecs (millions of light years) could directly interact with each other, their interaction happens across distances that are too large to be explained by their gravitational force. It is then speculated that some unacknowledged force must be acting.

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Created on Jun 12, 2020
By @gurlic