Astronomers find source of stars' mysterious microwaves

For 20 years scientists have wondered what creates the curious streams of radiation in the Milky Way

Mysterious streams of microwaves that come from far across the galaxy have been traced to immense clouds of spinning diamonds that swirl around newly-born stars.

Astronomers have been stumped by the strange waves since they were first spotted more than 20 years ago, but now appear to have solved the puzzle after training US and Australian telescopes on rings of dust that circle stars about 500 light years from Earth.