Astronomers find source of stars' mysterious microwaves first spotted 20 years ago - Surrounding the stars are vast quantities of diamond particles which rotate tens of billions of times per second, fast enough to emit microwaves which spread out across the universe, as reported in Nature Astronomy.

See the source article by following the link below:
Astronomers find source of stars' mysterious microwaves first spotted 20 years ago - Surrounding the stars are vast quantities of diamond particles which rotate tens of billions of times per second, fast enough to emit microwaves which spread out across the universe, as reported in Nature Astronomy.