Not exact matches
Astronomers have known for some time that certain black holes were
surrounded by thick, dense disks of gas and dust called
tori.
The team tracked the heat of the third outburst for almost two weeks after its discovery to investigate how volcanoes influence Io's atmosphere and how these eruptions feed a doughnut of ionized gas - the Io plasma
torus - that
surrounds Jupiter near Io's orbit.
They include a pair of stars in orbit around each other, with circumstellar disks
surrounding each star and a circumbinary
torus and disk that orbits the combination.