An All-Sky Map Showing the Radial Velocity of Neutral Hydrogen Gas (image) International Centre for Radio Astronomy Research Share Print E-Mail Caption An all-sky map showing the radial velocity of neutral hydrogen gas belonging to the high-velocity clouds of the Milky Way and two neighboring galaxies, the Large and Small Magellanic Clouds. Credit Credit: ICRAR Usage Restrictions Free to share, must attribute. Share Print E-Mail 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.