Endless Facts, One Snippet at a Time
Dark Matter: The Invisible Mass Holding Galaxies Together
- Dark matter makes up about 85% of all matter in the universe, yet it’s invisible.
- It doesn’t emit, absorb, or reflect light—only its gravity reveals its presence.
- Without dark matter, galaxies would spin apart—their visible mass isn’t enough to hold them together.
- Dark matter forms massive halos, acting as invisible scaffolding for galaxies.
- Evidence comes from galaxy rotation curves, gravitational lensing, and cosmic structure formation.
- The Bullet Cluster collision offers strong proof of dark matter existing apart from normal matter.
- Candidates for dark matter include WIMPs, axions, and other exotic particles.
- Despite decades of searching, no dark matter particle has been directly detected.
- Mapping dark matter helps scientists understand the cosmic web of galaxies.
- Solving the dark matter mystery could revolutionize physics and cosmology.