Galactic Scale Beta Decay?
Several years ago it was discovered that the massive galaxy (M87) ejected a globular cluster of stars at a velocity of roughly 2,000,000 miles per hour. See the links below for details.
https://www.cfa.harvard.edu/news/2014-09 and https://arxiv.org/abs/1402.6319 .
Discrete Scale Relativity explains this rather amazing phenomenon as the discrete self-similar analogue of a subatomic nucleus undergoing beta decay, wherein a neutron within a massive nucleus decays into a proton, an electron anti-neutrino and an electron. The electron is ejected at high velocity from the nucleus.
For a general discussion of Discrete Scale Relativity, see: http://www3.amherst.edu/~rloldershaw .
For a discussion of the discrete self-similarity between electrons and globular clusters, see the above website and click on the page “Galactic Scale Self-Similarity, then scroll down to section VI., “The Galactic Scale Electron Analogue”.
For 15 definitive predictions of DSR see: http://www.academia.edu/2917630/Predictions_of_Discrete_Scale_Relativity .
Fractal Cosmology, because it’s a fractal world