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Loading contentThe Universe today: expanding, accelerating, and dominated by dark energy and dark matter.
The present Universe is about 13.8 billion years old, geometrically flat, and composed of roughly 68% dark energy, 27% dark matter, and 5% ordinary matter. Its expansion is accelerating.
| Age | 13.787 ± 0.020 billion years | Planck Collaboration |
| Dark energy | ≈ 68% | Planck Collaboration |
| Dark matter | ≈ 27% | Planck Collaboration |
| Ordinary matter | ≈ 5% | Planck Collaboration |
Facts on this topic will be cited from these primary and reference sources.
Cosmic microwave background maps and the cosmological parameters of the ΛCDM model.
Mission data, planetary science, space telescopes, and public-domain imagery.
Most NASA-produced imagery is in the public domain; individual items are checked for usage terms before publication.