Observations of faint, planet-size star help weigh its millisecond pulsar companion.
A dense, collapsed star has shredded and consumed nearly the entire mass of its stellar companion and, in the process, grown into the heaviest neutron star, which tops the charts at 2.35 solar masses (the mass of our sun), helps astronomers understand the weird quantum state of matter inside these extremely dense objects. If they get much heavier than that, neutron stars collapse entirely and disappear as a
“We know roughly how matter behaves at nuclear densities, like in the nucleus of a uranium Heaviest Neutron Star Ever Discovered Is a “Black Widow” Devouring Its Mate