NGC 6240, 1 (of 2) (IMAGE) University of California - Riverside Caption NGC 6240 is an ongoing collision of two gas-rich disk galaxies. Using adaptive optics at the Keck II Telescope, University of California researchers have resolved young star clusters formed because of the merger (small blue dots), and have identified which features within the twin nuclei are associated with the two supermassive black holes known to inhabit the nuclear regions. In this image taken in infrared light, the nucleus from each of the two galaxies is shown using a color scheme that emphasizes the detail within the nuclei. The green vertical line represents one second of arc, or 1600 light years at the distance of NGC 6240. Credit C. Max, G. Canalizo, and W. de Vries 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.