The sun as a star (IMAGE) National Institutes of Natural Sciences Caption (Foreground) The time evolution of the total brightness of various solar emissions as a group of sunspots rotated across the surface of the Sun. (Background) Images of the Sun taken in the different kinds of emissions when the group of sunspots was near the middle of the Sun. Credit ISAS/NAOJ 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.