Dark matter makes up eighty-three percent of all matter
Without this invisible substance, the solar system would be flung into intergalactic space because ordinary matter lacks the gravity to keep it tethered.
The universe is largely composed of a substance that cannot be seen, touched, or measured by light. While protons, neutrons, and other ordinary particles form everything from stars to humans, they represent only 17 percent of the matter in existence. The remaining 83 percent is dark matter, an invisible scaffolding that provides the gravitational glue necessary to hold galaxies together.
Continue Reading in App
2 more paragraphs · plus a 3-question quiz