Dusty-Nebula (image) Max-Planck-Gesellschaft Caption Gone with the stellar wind: an extended dusty nebula surrounds VY CMa in the constellation Big Dog, one of the largest known stars in the universe. In the atmosphere of this huge sun, astronomers discovered the molecules TiO and TiO2. Credit Credit: Molecule symbols: CDMS/T. Kamiński. Background image: NASA/ESA and R. Humphreys (University of Minnesota). Usage Restrictions None 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.