Tag Archives: Penarrubia

The mystery of dark matter in small galaxies

Considering that dark matter is supposed to make up about 23% of all mass-energy density in the universe, it’s surprisingly difficult to pin down. It can’t be seen or measured directly, that much is known. Its existence is inferred from gravitational effects on things that instruments can see and from gravitational lensing (the bending of […]
Posted in News: Dark Matters | Also tagged , , , , , , | Comments closed