Neutron stars are formed when a huge star runs out of fuel and collapses. However, the mass range of neutron stars has been relatively well constrained over the years, it’s been tough to figure out how big they are. Now, new research that combines gravitational-wave measurements with other methods suggests that a typical neutron star is about 13.7 miles across. The size would have compelling implications when they will get close to other cosmic mysterious objects i.e black holes. The new size results suggest a black hole can consume a neutron star whole in many cases, leaving behind little proof that Earth-based astronomers can unveil with traditional telescopes.