A composite image showing the concentration of dark matter (multi-colored) in the core of a nearby galaxy

How much of the universe is made up of dark matter?

Astronomers estimate that around 85% of all matter in the universe is dark matter, which means that only 15% of all matter is normal matter. Given dark energy, the name astronomers give to the accelerated expansion of the universe, black matter accounts for about 27% of all mass energy in the cosmos, according to CERN (opens in a new tab) (the European Organization for Nuclear Research).

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