Astrophysicists are radically expanding our knowledge of image of pulsars, the ancient remains of exploded stars so dense their gravity warps nearby space-time, using NASA’s Neutron star Interior Composition Explorer (NICER), an X-ray telescope aboard the International Space Station to create the first-ever map of million-degree hot spots on the surface of J0030 in … Continue reading “Mapping Ghosts” — Ancient Pulsars, Objects So Dense They Warp Spacetime