Mar 4, 2026 06:42 PM
https://bigthink.com/starts-with-a-bang/...d-gravity/
KEY POINTS: A fascinating new galaxy, known as candidate dark galaxy-2 (CDG-2), was discovered using a variety of telescopes, including Hubble, through its four satellite globular clusters. If confirmed, it would be the faintest such galaxy ever discovered and the most dark matter dominated galaxy ever spotted, made up of more than 99.9% dark matter. However, other candidate dark galaxies have failed to materialize with deeper follow-up imagery, and CDG-2 might well be a phantasm. If real, it could cement the case for dark matter, but we aren’t there just yet.
EXCERPT: If both classes of objects are confirmed, and CDG-2 would be the most extreme example of a dark matter-rich dwarf galaxy ever found, then it really is the death-knell for modified gravity proposals. Sure, it’s observationally expensive to acquire those critical measurements, but with the contents of the Universe on the line, it sure is hard to justify not looking when the technology to do so is already here... (MORE - missing details)
KEY POINTS: A fascinating new galaxy, known as candidate dark galaxy-2 (CDG-2), was discovered using a variety of telescopes, including Hubble, through its four satellite globular clusters. If confirmed, it would be the faintest such galaxy ever discovered and the most dark matter dominated galaxy ever spotted, made up of more than 99.9% dark matter. However, other candidate dark galaxies have failed to materialize with deeper follow-up imagery, and CDG-2 might well be a phantasm. If real, it could cement the case for dark matter, but we aren’t there just yet.
EXCERPT: If both classes of objects are confirmed, and CDG-2 would be the most extreme example of a dark matter-rich dwarf galaxy ever found, then it really is the death-knell for modified gravity proposals. Sure, it’s observationally expensive to acquire those critical measurements, but with the contents of the Universe on the line, it sure is hard to justify not looking when the technology to do so is already here... (MORE - missing details)
