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"description": "NASA's Hubble Space Telescope has revealed an exceptional discovery in the Perseus galaxy cluster: CDG-2, an ultra-low surface brightness galaxy composed of 99% dark matter.
This elusive galaxy remained hidden until astronomers detected a slight increase in globular cluster density, suggesting the presence of an underlying galactic structure. Observations from Hubble, ESA's Euclid observatory, and the Subaru Telescope confirmed a faint halo of diffuse light surrounding these ancient star clusters.
Analysis indicates CDG-2 has the luminosity of approximately six million Sun-like stars, with the clusters comprising about 16% of its visible matter. The galaxy's normal matter was likely stripped away through gravitational interactions within the Perseus cluster.
This discovery provides a rare opportunity to study dark matter's fundamental properties and how it shapes galactic evolution across the universe.
For more information, visit science.nasa.gov/mission/hubble
Credit: NASA's Goddard Space Flight Center
Paul Morris: Lead Producer
Video Credits:
A simulation of the formation of dark matter structures from the early universe until today.
Ralf Kaehler/SLAC National Accelerator Laboratory, American Museum of Natural History
Image of the Subaru Telescope: NAOJ via ESA
Music Credit:
\"Lost to Eternity\" by Timothy James Cornick [PRS] via BBC Production Music [PRS] and Universal Production Music",
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