A Bizarre New Form of Dark Matter Could Uncover the Mysteries of Gravity-And Our Universe
Yahoo • • science
Key Points:
- Scientists have long sought to observe dark matter, an invisible substance believed to make up about 85% of the universe's matter, but it has remained elusive due to its presumed collisionless nature and invisibility to telescopes.
- A recent study proposes a new model of dark matter as "self-interacting," meaning its particles collide and interact with each other and ordinary matter, potentially explaining certain cosmic structures observed by astronomers.
- Evidence supporting this theory includes observations of a scarred stellar stream (GD-1), unusual gravitational lensing effects in distant galaxies, and the irregular star cluster Fornax 6, which may be influenced by dense dark matter cores.
- Challenges remain in confirming this model, as the exact nature and particles of dark matter are unknown, and current technology, including particle colliders and telescopes, is limited in detecting these phenomena directly.
- Upcoming wide-field telescopes like the Vera C. Rubin Observatory may provide critical data in the next five years to test the self-interacting dark matter hypothesis and deepen understanding of the universe’s fundamental makeup.
