EXPANDING UNIVERSE SOME EMPIRICAL SPEED

What neutron star and a black hole of the universe by looking at the speed you will be able to see that expanded. 
Hubble Constant is what we call this speed yet known. The Hubble constant has worked in many groups there but they all had different results. Harvard University and MIT are completely different method offered suggestions. Scientists at these institutions, neutron stars and found that suggested could benefit from gravitational waves from black hole binary system. Binary systems, stars or other celestial body by rotation around the giant each other  occurs. Neutron stars and black holes with an incredible energy while. This system creates the duo found time burst of light and gravity waves they collide with each other.

scientists in the research team, says the presence of the location of the sources of gravitational waves is extremely simple. The team, using gravity waves with light obtained from the explosion says the pace of expansion can be found.

The biggest problem at this point the neutron star - the binary black hole system is very rare. Scientists find a few of these two, they believe they can calculate the Hubble constant.