61–80 of 237 results


About Those 2 Trillion New Galaxies . . .

The news that astronomers find the universe has 10 times more galaxies than previously thought? There's less to this than the headlines say.

Galaxy cluster CL J1001+0220


A Galaxy Cluster Caught in Transition?

Astronomers have caught a galaxy cluster in the prime of its life — perhaps just before it transitions to retirement.

dwarf galaxy DDO 68


Of Dwarf Galaxies and Voids

Living in voids might be tangentially responsible for three small galaxies’ recent flurries of starbirth.

Bullet Cluster


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


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


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.

A Chandra/Hitomi view of Perseus Cluster


Doomed Hitomi Gazed at Galaxy Cluster

In its first — and final — month of flight, the Hitomi X-ray observatory measured the calm within the bubbling core of the Perseus Cluster.

Neutron star collision

Stellar Science

The Kavli Foundation Q&A: How Did Nature's Heaviest Elements Form?

The Kavli Foundation hosted a Q&A with three astronomers to probe the recent discovery of hard-to-produce heavy elements in a nearby dwarf galaxy. The discovery sheds light on stellar histories and galactic evolution.


Milky Way's New Neighbor: A Giant Dwarf

Astronomers have discovered a “feeble giant”: one of the largest dwarf galaxies ever seen around the Milky Way.

Most Distant Galaxy, GN-z11


Hubble Finds Most Distant Galaxy Yet

Astronomers using the Hubble Space Telescope have measured a precise distance to a galaxy dwelling in the cosmic dawn.

Australia's Compact Array

Stellar Science

Astronomers Pinpoint Mysterious Radio Burst

A radio burst with the energy of a hundred million Suns has finally been placed on the cosmic map, enabling scientists to investigate the origin of these mysterious bursts.

local large-scale structure


Galaxies Hidden Behind the Milky Way

Astronomers have detected hundreds of galaxies lying hidden behind the Milky Way's disk, many of which belong to the so-called Great Attractor, or Norma Supercluster.

galaxy clusters and how clumped together they are


Dark Matter Makes Galaxy Clusters Clump

How much galaxy clusters huddle together depends in part on how fast these clusters formed — and that formation rate depends on dark matter.

Aerial view of LIGO Hanford


About The LIGO Gravitational-Wave Rumor. . .

Gossip is racing around the physics and astronomy community: has LIGO finally heard its first black-hole merger? Here’s the reality.

Close-up of NGC 253-dw2 discovery photo


"Strongman" Aussie Discovers Dwarf Galaxy

All amateur Michael Sidonio wanted was a pretty astro-image of NGC 253. What he got instead was credit for discovering a rare dwarf galaxy.

MACS0717 galaxy cluster


Small Galaxies Helped Light Up Universe

Hubble observations confirm that much of the light that broke up the early universe’s hydrogen came from the smallest galaxies.

Experiment set-up


Is Dark Energy a Chameleon?

A lab experiment has all but nixed one of the theories of dark energy, a mysterious force pushing the universe apart.

cold-gas accretion simulation


Gigantic Protogalaxy in the Cosmic Web

Astronomers have found that a massive filament of gas in the early universe actually seems to be a humongous, galaxy-forming disk.

low-dust galaxies


Dust-poor Early Galaxies

New ALMA observations reveal low levels of dust in nine early galaxies, suggesting astronomers should revise some of their calculations.


Between Galaxies: Lonely Supernovae

Researchers confirm that three solitary stars have gone supernovae in intergalactic space.