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
The influence of dark energy on big empty patches in space could aid us in understanding the expansion of the universe – and predicting its ultimate fate