gold ball (IMAGE) University of Vienna Caption The gold ball used in size comparison with a 1 cent coin. According to Einstein's general theory of relativity, every mass bends space-time Credit © Tobias Westphal / Arkitek Scientific 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.