FAST and Arecibo spot possible dark galaxy with vast hydrogen reservoir
Astronomers found AGC 322753, an object holding roughly 2 billion solar masses of neutral hydrogen but no detectable starlight. Its radio signal hints at a rotating gas disk, yet deep images show no matching glow.
- AGC 322753 holds about 2 billion solar masses of neutral hydrogen
- Radio signal suggests the gas may rotate in a disk
- Deep images revealed no starlight matching the gas
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