Dark matter, which makes up 80 percent of all matter in the universe, may have formed in the very short time before the big ...

But what's an atom made of? What is matter, really? Matter is defined as that which 1) has mass and 2) has volume or takes up ...

Giant filaments crisscross the universe, connecting galaxy clusters like superhighways between cities. Their shape and ...

The nature of dark matter has puzzled astronomers since discovering that 85% of the universe's matter is invisible through ...

How do you weigh one of the largest objects in the entire universe? Very carefully, according to new research. The cosmic web ...

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 ...

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

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 ...