21–40 of 267 results
Field of galaxies with spiky

Cosmology

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

Galaxies

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)

Cosmology

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

Cosmology

How Galaxies Lose Their Dark Matter

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

3D galaxy map

Cosmology

Astronomy in Pictures: Largest 3D Map of Our Universe and a Stellar Intruder

This week astronomers have announced the completion of the largest 3D map of galaxies across the cosmos, plus exquisite radio observations show what happens when a stellar intruder interrupts planet formation.

Concept of the universe's expansion

Cosmology

No Release for the Hubble Tension

New data and analysis show that a long-standing discrepancy in the measurement of the current expansion rate of the universe is real — even as the reason for it remains a mystery.

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.

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

Cosmology

Astronomers Spot Galaxies Clustering in Early Universe

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