21–40 of 217 results
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.

cosmic time and quasar

Black Holes

Most Distant Black Hole Yet

Astronomers have discovered a supermassive black hole scarfing down gas just 690 million years after the Big Bang.

five black hole mergers

Cosmology

LIGO Sees Smallest Black Hole Binary Yet

LIGO has detected another black hole merger, raising the tally to five.

Neutron star collision

Cosmology

Astronomers Catch Gravitational Waves from Colliding Neutron Stars

Spacetime ripples from the neutron star smash-up usher in the age of multi-messenger astronomy.

People, Places, and Events

2017 Nobel Goes to Gravitational Waves

Three American physicists have received the Nobel Prize in physics for their contributions to the discovery of gravitational waves.

Virgo

Black Holes

Fourth Gravitational Wave Event Detected

Teaming up with LIGO, Europe’s Virgo detector has bagged its first gravitational waves. The three-observatory detection enabled scientists to better pinpoint the merging black holes’ location.

cosmic ray air shower

Cosmology

Some Cosmic Rays Come from Outside the Galaxy

Astronomers have detected more extremely energetic cosmic particles coming from one side of the sky than the other.

Cosmology

Featured Image: The Cosmic Velocity Web

Have you ever considered the idea of a cosmic velocity web? Learn more about these intriguing visualizations from the study led by Daniel Pomarède.

Cosmology

Does Dark Energy Change Over Time?

Scientists are considering whether the mysterious “force” accelerating the universe’s expansion changes with time.

Large-scale structure

Cosmology

Does the Milky Way Live in a Void?

A sparse galactic neighborhood could clear up certain problems with our understanding of the universe.

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.

Planck Cosmic Microwave Background with Cold Spot inset

Cosmology

Debate on Universe’s Cold Spot Heats Up

A new galaxy survey suggests that a supervoid isn’t responsible for the Cold Spot seen in the cosmic microwave background — the oddity may have a far more ancient origin.

Supernova Einstein Cross

Cosmology

Cosmic Lens Provides Unique View of Supernova

Astronomers have discovered a gravitationally lensed Type Ia supernova that will soon give them a new measure of the universe’s expansion.

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.

Abell 2744 galaxy cluster

Galaxies

Hubble Spies Faint Galaxies, Bountiful in Early Universe

Hubble has spotted more than 100 small, faint galaxies in the young universe, common as dust bunnies but previously out of reach of even the best telescopes.

Gravitationally lensed quasar

Cosmology

H0Li COW! Is Our Universe Expanding Faster Than We Thought?

Observations of lensed quasars suggest the universe is expanding more quickly than we thought. But they contradict what we know about the young universe.

local cosmic structure

Cosmology

Cosmic Void “Pushes” Milky Way

Astronomers have discovered a giant cosmic void that explains why our Local Group of galaxies is moving through the universe as fast as it is.

Pluto's Sputnik Planum in color

Milky Way

Top 12 Astronomy News Stories of 2016

From the discovery of gravitational waves to the building evidence that a massive planet could exist beyond Pluto, it has been a thrilling year for astronomy research. We recap.

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.

FRB spectrum

Cosmology

Radio Bursts Herald Future Science

For the first time, astronomers have discovered a (potential) high-energy counterpart to a fast radio burst, and also used a different burst to probe the cosmic web.

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