Astrophysicists are redrawing the textbook image of pulsars (the dense, whirling remains of exploded stars) thanks to NICER, an X-ray telescope aboard the International Space Station. NICER data has provided the first precise and dependable measurements of both a pulsar’s size and its mass, and the first-ever map of hot spots on its surface.
Click here for original story, NASA’s NICER Delivers Best-ever Pulsar Measurements, 1st Surface Map
Source: NASA Goddard Center