Almost 25,000 light-years away, two dead stars, each more massive than our Sun, but only 20 kilometers in diameter, orbit one another in less than five hours. This unusual pair of extreme objects, ...

Astronomers have discovered 21 "one in a million" binary systems in which sun-like stars orbit a hidden "dead star," an extreme dense and compact object called a neutron star. One of the neutron stars ...

An international team of astrophysicists from China and Australia has for the first time determined how massive neutron stars ...

Scientists have discovered that when neutron stars collide, they leave behind a remnant that doesn't resemble either of them. Neutron stars are the universe's most extreme stars, born when massive ...

This illustration depicts a binary star system consisting of a dense neutron star and a normal Sun-like star (upper left). Using data from the European Space Agency's Gaia mission, astronomers found ...

A new study showing how the explosion of a stripped massive star in a supernova can lead to the formation of a heavy neutron star or a light black hole resolves one of the most challenging puzzles to ...

Volume rendering of density in a simulation of a binary neutron star merger. New research shows that neutrinos created in the hot interface between the merging stars can be briefly trapped and remain ...

The universe has no shortage of oddities, and researchers at the National Science Foundation’s NOIRLab have observed another one in the form of a particular binary star system. The system, called ...

The first direct detection of gravitational waves, ripples in space-time caused by the movements of massive cosmic objects, a decade ago 1 marked the start of a new era in astronomy. Gravitational ...