Dark Matter

The XENON1T detector hasn't detected any dark matter particles yet. But it has carried out a 30-day science run, and project scientists are optimistic about the future.

Dark matter is far more abundant in the universe than the "normal" stuff we can see and touch. Learn about the evidence for dark matter in the fourth episode of "We Don't Planet."

Step aside, Star-Lord – there's another superhero in the universe, and it's "guarding" far more galaxies than you can even fathom.

Dark energy is the mysterious force causing the universe's accelerating expansion. Learn all about it in the second episode of the astrophysics video-explainer series "We Don't Planet."

A mysterious abundance of high-energy light near the Milky Way's core likely isn't a sign of elusive dark matter after all, a new study suggests.

An anomaly in the number of antineutrinos produced by nuclear power plants was a result of a modeling error, not a hint of new physics.

It may seem like we've got the universe pretty much figured out, but there is some pretty basic stuff that we just don't have a clue about.

Although the invisible substance known as dark matter dominates galaxies nowadays, it was apparently only a minor ingredient of galaxies in the early universe, a new study finds.

Astrophysicist Janna Levin's musings on the invisible stuff called dark matter provide inspiration for artist Daniela Sherer's imaginative illustrations in a new animated video.

There's a powerful gamma-ray signal blasting from the massive galaxy's core, possibly revealing a compact region filled with annihilating dark matter particles.

On Jan. 26, 2017, astronomers announced that the universe is expanding faster than previously thought. See photos of the quasars seen by the Hubble Space Telescope that made the discovery possible.

The universe really is expanding faster than scientists had thought, new research suggests.

What's causing so many galaxies in the universe to die before their time? A new study suggests star-forming gas is stripped out of even more galaxies than previously thought.

What have pulsars, quasars, dark matter and dark energy got in common? Answer: each of them took the discoverer by surprise.