Observations continue to indicate that the Universe is dominated by invisible components — dark matter and dark energy. Shedding light on this cosmic darkness is a priority for astronomers and ...

Ordinary matter such as that in people, planets, stars, and galaxies, comprises only some 5 percent of the universe. Dark matter accounts for roughly a quarter, while dark energy is the largest ...

We have never seen dark matter and dark energy, so why do we think they exist? And what would happen if Europe's new space telescope Euclid finds evidence that they don't exist after all?

In short, dark matter slows down the expansion of the universe, while dark energy speeds it up. Dark matter works like an attractive force — a kind of cosmic cement that holds our universe together.

Unlike for dark matter, scientists have no plausible explanation for dark energy. According to one idea, dark energy is a fifth and previously unknown type of fundamental force called quintessence ...

Dark matter is dark: It emits no light and cannot be seen directly, so it cannot be stars or planets. Dark matter is not clouds of normal matter: Normal matter particles are called baryons.

Robert Caldwell, a cosmologist at Dartmouth College, explains. Dark energy and dark matter describe proposed solutions to as yet unresolved gravitational phenomena. So far as we know, the two are ...

Collaboration has obtained a high-precision cosmic-ray boron spectrum in the energy range of 10 GeV/n–8 TeV/n, and discovered ...

A ll of the matter that can be seen and detected makes up just 5% of the universe. The rest is either dark matter or dark energy. Neither of them reflect or emit light, making them fiendishly ...

We examine what cracks in the standard model of cosmology could mean for the quest to understand dark matter and dark energy. Host: Alok Jha, The Economist’s science and technology editor.