Runaway Black Holes Leave Cosmic Contrails Across Galaxies
The article explains how spinning black holes can be ejected from galaxies by anisotropic energy release during mergers, and how gravitational-wave observations (LIGO/Virgo) and JWST imaging now provide evidence that such runaway black holes exist, potentially leaving long stellar contrails as they travel through galaxies. While these events can be extremely energetic, they are rare and pose negligible risk to Earth.