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This mystery object may be loaded with dark matter

A strange, starless cloud on the edge of a nearby galaxy is forcing astronomers to confront one of the biggest unknowns in ...
PRIMETIMER

Astronomers discover a “failed galaxy” made only of dark matter and gas

Astronomers have identified Cloud 9, a nearby dark matter halo filled with gas but no stars. The discovery supports key predictions about how galaxies form and why some never do.