A team of astronomers has performed one of the highest resolution observations in astronomical history by observing two intense regions of radiation, 20 kilometres apart, around a star 6500 light-years away. The extraordinary observation was made possible by the rare geometry and characteristics of a pair of stars orbiting each other. One is a cool, lightweight star called a brown dwarf, which features a “wake” or comet-like tail of gas. The other is an exotic, rapidly spinning star called a pulsar. The pulsar is designated PSR B1957+20.
— source dunlap.utoronto.ca