A
cosmic phenomenon
on a colossal
scale, resulting from the acceleration of a gas cloud by a black hole and its reacceleration by the shock waves from the merging of two galaxy clusters, has been
observed, described and interpreted by an international collaboration of astronomers that included three Brazilians: Felipe Andrade - Santos, Vinicius Moris Placco, and Rafael Miloni Santucci.
It is conjectured that this mechanism could be the explanation for the
observed correlations between past climate variations and
cosmic rays, modulated by either solar activity or supernova activity in the solar neighborhood
on very long time
scales.