Color image made by combining the g, r, and i filters from Legacy Surveys ALFALFA and FASHI. The intersection between the two beams is the most probable location for the optical counterpart of AGC 322753, highlighted in the red inset. Here, marked sources with the short horizontal and vertical lines are foreground stars confirmed with Gaia DR3, and the galaxy marked by a white arrow is in the background. Credit: Monthly Notices of the Royal Astronomical Society (2026). DOI: 10.1093/mnras/stag1874
Astronomers have found a vast reservoir of hydrogen with something conspicuously missing: detectable starlight. The object, called AGC 322753, contains roughly 2 billion times the sun’s mass in neutral hydrogen, a potential supply of material for making stars...
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