“FAST and Arecibo Reveal Possible Dark Galaxy AGC 322753 with 2 Billion Solar Masses of Hyd” — what this page in the network covers. Astronomers using the Five-hundred-meter Aperture Spherical Telescope (FAST) and the Arecibo Observatory have identified a massive reservoir of neutral hydrogen, designated AGC 322753, that appears to lack any detectable starlight. The object contains roughly 2 billion times the mass of the Sun in h The object contains roughly 2 billion times the mass of the Sun in hydrogen gas, a potential fuel for future star formation.
Radio observations indicate the gas may be organized in a rotating disk, yet deep optical imaging shows no corresponding galaxy. This unusual combination suggests AGC 322753 could be a 'dark galaxy'—a system dominated by dark matter and gas but with few or no stars. Such objects are predicted by galaxy formation models but have been difficult to confirm. This listing links straight to the original page, where the content is available in full.