*> Why does the dark matter stop?* The dark matter doesn't stop; it keeps going....

		pdonis on June 28, 2020 \| parent \| context \| favorite \| on: It's time to take alternatives to dark matter seri... > Why does the dark matter stop? The dark matter doesn't stop; it keeps going. > Don't colliding galaxies stop due to gravity Not really. As others have noted, they stop due to non-gravitational interactions between the ordinary matter (mainly gas and dust clouds).