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Cosmology

A Mysterious X-ray Signal Has Gone Missing

The absence of a mysterious X-ray signal — which could have provided evidence of dark matter — is causing as much controversy as its detection did.

Gravitational lensing

Cosmology

Hubble Sheds Light on Dark Matter and Cosmic Expansion

The Hubble Space Telescope, which will celebrate its 30th birthday this April, has images cosmic mirages that yield two remarkable cosmological results.

Artist's illustration of pulsar Geminga

Cosmology

Should We Blame Pulsars for Too Much Antimatter?

A new study suggests that pulsars are not the source of an unexpected surplus of antimatter particles detected by a space-based experiment. Dark matter remains a viable alternative explanation.

GD-1 and Palomar 5

Milky Way

Evidence for a Dark Matter Clump in the Milky Way

There are ghosts in our galaxy’s past. Now astronomers have found a way to detect them.

First Stars (art)

Cosmology

Primordial Chill Hints at Dark Matter Interactions in Early Universe

A simple experiment has detected a signal from the first stars forming just 180 million years after the Big Bang. The observations have intriguing implications for the nature of dark matter.

Sculptor dwarf galaxy

Cosmology

Stars Map Dark Matter in Dwarf Galaxy

A combo of Hubble and Gaia data reveal the distribution of dark matter in a tiny galaxy by tracking the galaxy’s stars.

The Milky Way's Gamma-ray excess

Cosmology

The Origin of the Milky Way's Mysterious Gamma Rays

Our galaxy's center region is producing gamma rays, but astronomers are still debating whether pulsars or dark matter are the source. Three recent studies tackle the debate head-on.

Galaxy rotation curves

Cosmology

Less Dark Matter in Young Galaxies?

A new study of six young, star-forming galaxies suggests they have less dark matter than expected. But the results may say more about galaxy evolution than about the nature of dark matter.

KIDS Dark Matter Map

Cosmology

Not-So-Clumpy Dark Matter Poses Cosmological Challenge

Astronomers analyzing a new sky survey have found that the distribution of dark matter in the modern universe is smoother than predicted from observations of a far younger universe.

Bullet Cluster

Cosmology

Does a Fifth Force Permeate the Universe?

A team of theoretical physicists thinks a fifth force could explain an anomaly spotted in a nuclear physics experiment. If true, it could have huge ramifications for particle physics and dark matter — but that’s a pretty big if.

IceCube neutrino telescope

Cosmology

Search for Fourth Neutrino Goes Cold

The Antarctic observatory known as IceCube has ruled out the existence of a fourth type of neutrino particle — and one-time dark matter contender — known as the light sterile neutrino.

Bottom view of LUX

Cosmology

No Dark Matter from LUX Experiment

An underground detector reports zero detections of weakly interacting massive particles (WIMPs), the top candidate for mysterious dark matter.

Science-based Q&A

The Kavli Foundation Q&A: Dwarf Galaxies and the Quest for Dark Matter

Satellite dwarf galaxies orbiting the Milky Way should help scientists better grasp the universe's evolution while also homing in on dark matter's identity.

Cosmology

Mapping Dark Matter

Two projects are mapping the distribution of dark matter in the universe, probing scales both large and small.

Cosmology

How Slippery Is Dark Matter?

Dozens of galaxy clusters confirm that dark matter particles slip right past each other within messy cluster mergers.

Potential dwarf galaxies

Cosmology

New Dwarf Galaxies Near Milky Way

Astronomers have found a set of new dwarf galaxy candidates near the Milky Way Galaxy, a discovery crucial to understanding dark matter.

Galaxy cluster Abell 1689

Astronomy Questions & Answers

The Kavli Foundation Q&A: Dark Matter at Long Last? Three New Experiments Ramp Up

Three astrophysicists discuss preparations for three recently funded dark matter experiments, and the likelihood that one of them will strike gold.

Perseus Cluster

Cosmology

Mysterious X-rays Might Hint at Dark Matter

Astronomers have discovered a spike of X-ray emission in galaxy clusters — “ordinary” interpretations don’t hold up, so some are turning to dark matter for answers.

Cosmology

Dark Matter Spotted in the Milky Way?

A team of astronomers claim to have the most compelling case for annihilating dark matter yet.

Cosmology

Two Blows for Dark Matter Model

Two recent experiments limit physicists’ favorite candidate for the elusive and invisible matter lurking in the universe.

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