diagram (IMAGE) The Chinese University of Hong Kong Caption Artistic representation of a collision of two boson stars, together with the gravitational waves emitted. Credit Nicolás Sanchis-Gual and Rocío García-Souto Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.