Using ESA’s Integral and XMM-Newton observatories, an international team of astronomers has found more evidence that massive black holes are surrounded by a doughnut-shaped gas cloud, called a torus.

A vortex ring is a torus-shaped, fluidic region where the fluid spins around an imaginary axis line. Vortex rings exist almost ubiquitously in nature 1,2,3,4 and have stimulated numerous studies for ...

Right now, you are looking into a space where plasmas are crushed into a torus shape, subjected to a magnetic field, and then heated and pressurized until their nuclei fuse. It’s called the National ...