(Phys.org)—An international team of astronomers led by Liliana Rivera Sandoval of the University of Amsterdam, Netherlands, has found 22 new cataclysmic variable stars in a globular cluster known as 47 Tucanae (47 Tuc for short). The discovery makes 47 Tuc the cluster with the highest number of cataclysmic variables identified so far. The findings were detailed in a paper published May 19 on arXiv.org.