Cosmological parameter · Ωm
Matter Density (Ωm)
The fraction of the universe's total energy density that is in matter — dark matter plus ordinary baryonic matter — today. Together with the dark-energy density it sets the geometry and the fate of the universe; it is measured most precisely from the cosmic microwave background.
Methods, objects & facilities
Knowledge connections
- Associated withDark Matter
- Associated withThe Cosmological Constant (Λ)
- Associated withPlanck
Sources
The primary and reference sources this topic draws on.
- Planck CollaborationESA Planck mission / Planck Collaboration
Cosmic microwave background maps and the cosmological parameters of the ΛCDM model.