A group of astronomers at the University of Toronto in Canada has performed one of the highest resolution observations in the history of astronomy by observing two intense regions of radiation around PSR B1957+20, a so-called ‘black widow’ pulsar located in the northern constellation of Sagitta, approximately 6,500 light-years from Earth. Their results appear in the journal Nature. PSR B1957+20 is seen in the background through the cloud of gas...