Relative size of the Wolf-Rayet star (IMAGE) University of Sydney Caption Relative size of the Wolf-Rayet star, its O-type blue supergiant, and the Sun, at top left Credit JPL-Caltech Usage Restrictions Credit must be given to the creator. License CC BY 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.