In 1916, Albert #Einstein predicted the existence of #GravitationalWaves in his General Theory of Relativity, but he doubted they could be detected. Now, for the second time ever, #LIGO has observed these waves following the collision of two neutron stars. . Photo: Artist's rendition of two colliding neutron stars. Credit: National Science Foundation/LIGO/Sonoma State University/A. Simonnet . . #Space #Spacetime