Neutron star and black hole masses in binary systems are calculable using Kepler's laws of motion, based on orbital parameters and object speeds. Merging neutron stars or black holes emit ...

A team of astronomers have found a mysterious object in the distant universe that could be dark matter or an inactive smaller ...

The object was detected by observing how its gravity distorts light behind it. Astronomers have discovered an extremely faint ...

Dark matter is an enigmatic form of matter not expected to emit light, yet it is essential to understanding how the rich ...