When these stars dance, they make their own music. Astronomers have tracked down the source of a mysterious radio signal from deep space repeating every two hours. Stunningly, it's a pair of stars in such a tight orbit that their magnetic fields regularly bump into each other — and it's this bodily percussion which is blasting out the radio emissions we're picking up on Earth. The findings on the binary system, published in a new study in the journal Nature Astronomy, shine a much needed light on a new class of cosmic signal known as long-period radio transients.  These extremely […]