Quasars (image) Yale University Caption The team found that mergers of gas-rich galaxies resulted in an obscured quasar surrounded by dust. After 100 million years, the dust is blown away to reveal a brightly shining quasar that lasts for another 100 million years. Credit E. Treister and Karen Teramura (IfA, University of Hawaii); NASA Usage Restrictions Must contact for image use. 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.