Astronomers have previously theorised that a thick ring of dust, known as a torus, surrounds the supermassive black holes at the centre of huge galaxies
Dust clouds can explain puzzling features of active galactic nuclei
Mysterious features seen in light emitted from active galactic nuclei may be due to partial obscuration by dust clouds
Super black holes in massive galaxies control star formation
A recent study has revealed a link between the mass of a galaxy’s supermassive black hole and its stellar history