Forwarding you to greenbankobservatory.org

Most Massive Neutron Star Ever Detected, Almost too Massive to Exist - Green Bank Observatory

Astronomers using the GBT have discovered the most massive neutron star to date, a rapidly spinning pulsar approximately 4,600 light-years from Earth. This record-breaking object is teetering on the edge of existence, approaching the theoretical maximum mass possible for a neutron star.