Massive X-ray binary
a superstar in a faraway galaxy called M33
Technical definition
A binary system consisting of a compact object (such as a neutron star or black hole) and a massive star, which is emitting intense X-ray radiation.
a superstar in a faraway galaxy called M33
A binary system consisting of a compact object (such as a neutron star or black hole) and a massive star, which is emitting intense X-ray radiation.