Summary:
- The article discusses how gravitational wave observations have provided new insights into the nature of neutron stars, which are the extremely dense remnants of massive stars that have collapsed.
- Gravitational wave signals from merging neutron star pairs have allowed scientists to measure the size and internal structure of these exotic objects, revealing that they are much more complex than previously thought.
- The findings suggest that neutron stars have a solid outer crust and a liquid interior, with a phase transition between the two that may be related to the formation of the strong magnetic fields observed in these stars.