JAMES: Because mass is about the amount of matter, whereas weight is a force and is the heaviness due to gravity. ELLIE: Exactly. So let me tell you about the equation you need to calculate the ...

Currently, dark matter detection requires specialized laboratories with costly equipment. ODIN, which combines principles of ...

However, scientists don’t see enough visible mass in many galaxies in the universe, yet gravity keeps such galaxies intact.

Perhaps one of the most surprising discoveries of the 20th century was that this ordinary, or baryonic, matter makes up less than 5 percent of the mass of the universe. The rest of the universe ...

A piece of iron with the same dimensions as a piece of aluminium will be heavier because the atoms are more closely packed and each iron atom has much more mass than each aluminium atom.

Although dark matter makes up about 85% of all mass in the Universe, it's extremely difficult to detect and defies a ready description. But dark matter influences the large scale structure of ...

Mass balance ensures that the carbon formerly ... individual elements can vary a great deal between nonliving and living matter (Figure 5). Life on Earth depends on the recycling of essential ...

how gravity can exist without mass, providing an alternative theory that could potentially mitigate the need for dark matter.