By Chen Ly.
The double system has two active pulsars in just over an hour.
Michael Kramer is a member of theMPIfR.
The most stringent test to date has passed Einstein's famous theory of general relativity. Researchers have observed a pair of pulsars for 16 years, and they have seen effects that have been predicted by the theory.
The effect of gravity on space-time is described by general relativity. Robert Ferdman, a professor at the University of East Anglia in the UK, says that if we have something that is really massive, it will warp the space-time around it.
General relativity predicts that light will be bent around a massive body like a neutron star as it follows a warped path of space-time. If two of them are spiralling around one another, they will emit ripples in space-time that will cause their orbits to shrink as they lose energy.
