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Hubble found a dim, dark matter-rich galaxy candidate 300 million light-years away, hinting at elusive dark galaxies.
NASA's Hubble Space Telescope has detected a faint object, Candidate Dark Galaxy-2 (CDG-2), about 300 million light-years away, which may be composed of at least 99.9% dark matter.
It emits only 0.005% of the Milky Way’s brightness and contains just four globular clusters, suggesting it lost most of its star-forming gas to nearby galaxies.
Researchers believe the clusters’ gravitational binding indicates a vast dark matter halo, supporting the existence of dark galaxies—hypothetical, star-poor systems predicted by cosmological models but never directly observed.
This discovery, led by Dayi Li of the University of Toronto, introduces a new method for detecting such elusive objects by focusing on globular clusters.
Further confirmation may come from the James Webb Space Telescope, potentially advancing understanding of dark matter and galaxy formation.
El Hubble encontró una galaxia candidata débil y rica en materia oscura a 300 millones de años luz de distancia, insinuando galaxias oscuras esquivas.