Assuming dark matter exists, its interactions with ordinary matter are so subtle that even the most sensitive instruments ...

The rate at which the universe is expanding is expressed as a value called the Hubble Constant, generally abbreviated as “H 0 ...

The universe’s light-starved early epochs, as well as the first stars and galaxies, lie beyond the reach of conventional ...

“The assumption that dark matter and regular matter originated in the same event, the Big Bang, is natural, given its ...

Dark matter refers to material that does not absorb, reflect, or emit any electromagnetic radiation. Astronomers have ascertained the existence of dark matter through the gravitational influence ...

Fresh corroboration of the perplexing observation that the universe is expanding more rapidly than expected has scientists ...

Gamma rays emerging from neutron stars at the hearts of supernova explosions could solve the mystery of dark matter — in just ...

Sometimes in astronomy, a simple question has a difficult answer. One such question is this: what is the mass of our galaxy?

Assuming dark matter exists, its interactions with ordinary matter are so subtle that even the most sensitive instruments cannot detect them.In a new ...

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