Abstract:
First, gravitational waves are some verifications of general relativity, and proved they are nonlinear waves. Further, GW170817 observed association with the γ−ray burst (GRB) 1.7 s after binary neutron star (BNS) merged gravitational waves, which proved both velocities of gravitational wave and electromagnetic wave are different. We calculate gravitational redshift and the deflection of light for BNS, delay time is 0.179 2 s. Next, we propose eight possible tests of the negative matter as unify dark matter and dark energy, in particular, the season effect. Further, the gravitational wave astronomy will give play to important role in test of the negative matter. Finally, a new most perfect symmetrical world is obtained.