1–20 of 232 results

Cosmology

Twisters in the Cosmic Web

Astronomers have found that the largest structures in the universe spin, making twister-like strings of galaxies and dark matter in the cosmic web.

Dark Energy Survey

Cosmology

Dark Energy Survey Catalogs 226 Million Galaxies

The latest release from the Dark Energy Survey catalogs millions of galaxies, mapping the history of galaxy clustering across space and time.

HD 122563 closeup

Cosmology

In Search of Ancient Suns

We track down and admire five of the most ancient stars in the universe.

Elliptical galaxy NGC 1453

Cosmology

New Studies Agree: The Universe Is Expanding Faster Than Expected

Measurements of elliptical galaxies provide a new way of calculating the current expansion rate of the universe. And the results are adding to a growing controversy.

Protocluster

Galaxies

Astronomers Spot Galaxies Clustering in Early Universe

Astronomers have discovered a cluster of galaxies coming together just 770 million years after the Big Bang.

New Horizons

Galaxies

What New Horizons Found in Deep Space — And Why It Matters

NASA’s mission to the outer solar system has found more light than expected. That could mean more galaxies in the visible universe than we thought— or less, depending on who you talk to.

Timing an array of pulsars

Cosmology

Pulsars Show Hint of Gravitational-wave Background

Duos of supermassive black holes tangoing throughout the universe make their own music, and astronomers may have picked up a hint of the tune.

Cosmology

A Dark Matter-less Galaxy, Explained (Maybe)

An international team of astronomers has explained the lack of dark matter in a distant dwarf galaxy — another galaxy stole it.

ALMA image of Hubble Ultra Deep Field

Galaxies

Astronomers Chart Star Formation History, Glimpse Fate of the Universe

Astronomers have tallied how star-making material evolved over cosmic time — and they've predicted how long stars will keep forming before the universe goes dark.

Dark matter: Theory vs. Observed

Galaxies

Hubble Images Reveal Dark Matter Problem

Astronomers studying Hubble Space Telescope images of massive galaxy clusters have uncovered a potential problem with dark matter.

Gravitational waves from GW190521

Cosmology

Record-breaking Signal Reveals New Population of Black Holes

Gravitational-wave observatories have detected the most massive black hole merger yet, and it's challenging our ideas of black hole formation.

Protoplanetary disk

Cosmology

Hints of Young Solar Systems

By studying the images of small young star systems, astronomers expect to learn more about the formation of our solar system.

KIDS survey

Cosmology

Our Unexpectedly Smooth Universe May Point to New Physics

The latest data release from a survey of 31 million galaxies reveals that our universe is even smoother than we thought it was.

EBOSS map of the universe

Cosmology

New 3D Map of the Universe — and a Growing Cosmological Debate

The Sloan Digital Sky Survey has released a new map of the universe — and the results confirm ongoing tension over the expansion rate of the universe.

Erosita's first all-sky X-ray survey

Black Holes

First All-sky Map from eRosita

The first all-sky X-ray map to be released in 30 years reveals new wonders of the hot and energetic universe.

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.

Perseus Cluster

Cosmology

Astronomers Rein in Possibilities for Exotic Particle

Astronomers observing a distant galaxy have dramatically shrunk the range of possible properties of a long-predicted — but never-detected — subatomic particle.

Pulsar-white dwarf pair

Stellar Science

White Dwarf’s Whirlwind Spin Drags Spacetime

Astronomers have used observations of a tight white dwarf-neutron star pair to confirm an aspect of Einstein's general theory of relativity.

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.

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