Most of the universe cannot be seen with any telescope, and that is not because scientists lack powerful tools. It is because the cosmos is ruled by substances that give off no light at all. Dark ...

The largest 3D map of the universe reveals over 47 million galaxies, but dark energy remains an unsolved mystery.

A new study suggests that decaying dark matter may have helped create the universe’s first supermassive black holes much ...

Most of the matter and energy in the cosmos does not shine, yet its presence is written into the way galaxies twist, stretch, and smear across the sky. By treating those warped galaxies as data rather ...

Ask most astronomers, and they’ll tell you that dark matter and dark energy make up more than 95 percent of the universe and that they are the explanations for many of the large-scale phenomena we ...

Only about 5% of the universe is composed of normal matter that we can directly observe, while the remaining 95% is widely ...

A new high-resolution map of distant galaxies may help scientists understand a mysterious invisible substance that helps hold the universe together. The ordinary matter all around us — stars, planets ...

NEW YORK — A new high-resolution map of distant galaxies may help scientists understand a mysterious invisible substance that helps hold the universe together. The ordinary matter all around us — ...

Roughly 80 percent of the mass of the universe appears to be dark matter: an invisible material that seems to interact with ...