Space
Galactic smash-ups turn on the lights around black holes
Trails of stellar debris suggest that ancient galactic crashes funnelled gas toward a central black hole, sparking active galaxies' inner glow
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Trails of stellar debris suggest that ancient galactic crashes funnelled gas toward a central black hole, sparking active galaxies' inner glow
No one knew how the energetic radiation from young, hot stars that grow up to be planet factories picks a direction – but now we've watched it in action