Astronomers may have found a massive galaxy with almost no visible stars. The object, AGC 322753, holds around 2 billion solar masses of hydrogen gas. A team at Swinburne University of Technology spotted it by cross-checking radio data from two earlier sky surveys. Its gas produces a double-peaked signal, which may mean the cloud is spinning like a disc. Settling the question will take follow-up work, such as with the Very Large Array in New Mexico, since faint stars or a spread-out gas cloud are still possible explanations.