According to the theory of general relativity, a galaxy must have a certain amount of mass to be held together by gravity. However, scientists don’t see enough visible mass in many galaxies in ...

Now a wild new study suggesting that gravity can exist without mass, conveniently eliminating the need for one of the most elusive substances in our Universe: dark matter. Dark matter is a ...

So, a 5 kg mass on Earth has a 5 kg mass on the Moon because the amount of matter stays the same. Weight is the force of gravity acting on an object. Weight is a force and so it is measured in ...

If gravity arises from entropy, scientists could unite Einstein's general relativity with the quantum realm while shedding light on dark matter and dark energy.

Astronauts’ skeletons can also be affected without Earth’s gravity. Bones can start to demineralize and lose their strength, ...

The force of gravity is different on different planets ... The gravitational field strength (\(g\)) of a planet is the weight per unit mass of an object on that planet. It has the units, newtons ...