1–20 of 253 results
Artist's concept of giant structures made of galaxies

Cosmology

Galaxies Outline Bubble 1 Billion Light-Years Wide in Space

A newfound cosmic alignment of galaxies challenges fundamental ideas about the nature of our universe.

Diagram showing lensing of quasar light by foreground galaxy and intergalactic dark matter

Cosmology

Dark Matter Clumps Float Between Galaxies, Data Shows

Astronomers have found clumps of dark matter 30,000 light-years wide in the space between galaxies in the distant universe.

Galaxy field with blue blob in inset

Cosmology

Another Early-Universe Mystery: JWST Spies Dust at Cosmic Dawn

Dust is usually the product of generations of star formation. So what is all this dust doing in the early universe, just a few hundred million years after the Big Bang?

Three red smudges could be distant galaxies or dark stars

Cosmology

Some Astronomers Claim Dark Star Candidates in Webb Images

Three distant galaxies imaged by the James Webb Space Telescope might actually be "dark stars" powered by dark matter annihilation, claims a team of astronomers.

Nova Persei expansion

Explore the Night with Bob King

Time-lapse Animations Reveal a Universe in Transformation

Deep-sky objects may appear static throughout our lifetime but by carefully "blinking" archival and current images we can discern real changes in their appearance.

Captured globulars

Explore the Night with Bob King

See Summer's Best “Gobbled” Globulars

Mergers between the Milky Way and long-ago dwarf galaxies have enriched our skies with dozens of iconic globular clusters. Many are visible in small telescopes.

Field of galaxies with spiky

Galaxies

Webb Telescope Tracks Universe's First Light

New results from the James Webb Space Telescope find that radiation from ordinary galaxies cleared the primordial haze left over from the Big Bang, allowing the first light to shine through the early universe.

Supernova Refsdal in widefield image of galaxies

Cosmology

Replay of Star’s Death Sheds Light on Universe’s Expansion

A cosmic lens magnified the light of an exploding star. Now, astronomers are using observations of that supernova to calculate the universe’s current rate of expansion.

Galaxies

Distorted Galaxy Hints at the Nature of Dark Matter

Astronomers analyzed the gravitationally lensed image of a distant galaxy to test the nature of dark matter.

Black field spotted with galaxies

Cosmology

What the Discovery of Massive Early Galaxies Could Mean for Cosmology

JWST's detection of early galaxies that are far more massive than astronomers had expected could mean we need to rewrite our understanding of the cosmos.

Artist's concept of a first-generation star tearing itself apart

Cosmology

The First Stars Weren’t Born Alone

New evidence suggests the first stars to shine in the universe formed in groups.

cluster of various galaxies

Cosmology

The Universe Is Too Smooth By Half

Results from a complex new analysis support cosmologists’ suspicions that something is missing from our understanding of the universe.

Galaxies

The James Webb Space Telescope Is Finding Too Many Early Galaxies

Images and spectra from the James Webb Space Telescope suggest that the first galaxies in the universe are too many or too bright compared to what astronomers expected.

Artist's concept of a first-generation star tearing itself apart

Stellar Science

Tentative Evidence of the First Generation of Stars

Scientists have detected something unusual around a distant quasar — perhaps the first real evidence of a first-generation star.

JWST deep-field image showing many galaxies

Cosmology

Webb Telescope Shatters Distance Records, Challenges Astronomers

Distant galaxies in Webb images suggest we need to rethink star and galaxy evolution in the early universe.

white and gold interior of LUX detector

Cosmology

Dark Matter Remains Elusive – For Now

The first run of a new dark matter experiment turns up nothing — but that still tells us something.

AGN (art)

Galaxies

Hubble Image Reveals Possible Quasar Forerunner

A distant object in a deep Hubble Space Telescope field could be in transition from ordinary galaxy to brilliant beacon of light.

Lensing close-up

Galaxies

Meet Earendel, the Most Distant Star Astronomers Have Observed

The Hubble Space Telescope has revealed a single star whose light has traveled for 12.9 billion years to Earth — the most distant star known.

First Stars (art)

Cosmology

No Signal from Cosmic Dawn

Four years after one experiment found tentative signs of the "cosmic dawn," the era of the first stars, another experiment finds nothing.

Dark matter-less galaxy

Galaxies

How Galaxies Lose Their Dark Matter

A careful study of cosmological simulations shows that dark matter–less galaxies aren't impossible — just really rare.

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