However, dark matter betrays its presence through gravity, because every single form of mass and energy in the universe exerts some sort of gravitational influence. So the only surefire way to study dark matter is through its gravitational interactions with normal matter, such as the motions of stars inside galaxies.

Does dark matter have gravity?

Dark energy

It is distributed evenly throughout the universe, not only in space but also in time – in other words, its effect is not diluted as the universe expands. The even distribution means that dark energy does not have any local gravitational effects, but rather a global effect on the universe as a whole.

Is dark energy related to gravity?

The rest of the universe appears to be made of a mysterious, invisible substance called dark matter (25 percent) and a force that repels gravity known as dark energy (70 percent).