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.
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.
Observations of lensed quasars suggest the universe is expanding more quickly than we thought. But they contradict what we know about the young universe.
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.
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.
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.
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.
The news that astronomers find the universe has 10 times more galaxies than previously thought? There's less to this than the headlines say.
Astronomers have caught a galaxy cluster in the prime of its life — perhaps just before it transitions to retirement.
Living in voids might be tangentially responsible for three small galaxies’ recent flurries of starbirth.
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.
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.
An underground detector reports zero detections of weakly interacting massive particles (WIMPs), the top candidate for mysterious dark matter.
In its first — and final — month of flight, the Hitomi X-ray observatory measured the calm within the bubbling core of the Perseus Cluster.
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.
Astronomers have discovered a “feeble giant”: one of the largest dwarf galaxies ever seen around the Milky Way.
Astronomers using the Hubble Space Telescope have measured a precise distance to a galaxy dwelling in the cosmic dawn.
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.
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.
How much galaxy clusters huddle together depends in part on how fast these clusters formed — and that formation rate depends on dark matter.
Gossip is racing around the physics and astronomy community: has LIGO finally heard its first black-hole merger? Here’s the reality.
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.
Hubble observations confirm that much of the light that broke up the early universe’s hydrogen came from the smallest galaxies.
A lab experiment has all but nixed one of the theories of dark energy, a mysterious force pushing the universe apart.
Astronomers have found that a massive filament of gas in the early universe actually seems to be a humongous, galaxy-forming disk.