The Milky Way's galactic underworld (IMAGE) University of Sydney Caption Colour top-down and side-view of the Milky Way's galactic underworld Credit University of Sydney 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.