SUNSET: 
Pulsars Yield Dark Matter Density in Our Galactic Neighborhood
A new technique to measure the motions of pulsars for the first time enables more precise estimates of local dark matter density.
Dark Matter–Dominated Galaxies in the Early Universe
Small galaxies in the early universe might have had centers dominated by dark matter, according to new research.
Using Ancient Ultraviolet Light to Probe Theories of Cosmology
By studying the formation and evolution of galaxies in the early universe, researchers seek to test the predictions of our leading theory of cosmology.
New Cosmology Probe Presents First, Stunning Images
The Horsehead Nebula and other stunning scenes highlight the talents of the just-launched Euclid mission. The telescope will reach into the depths of the cosmos to understand dark matter and dark energy.
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.
Kite-like Galaxy Trails a Million-light-year String of Gas and Star-forming Knots
A galaxy 600 million light-years away appears to be trailing gas in a string 1.2 million light-years long, but explaining its origins presents a challenge.
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.
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.
Dark Matter Remains Elusive – For Now
The first run of a new dark matter experiment turns up nothing — but that still tells us something.
A Cosmic Collision Could Have Made Two Dark Matter–Less Galaxies
Astronomers connect the dots between two strange doppelganger galaxies, uncovering what might be a string of galactic pearls created in a cosmic collision 8 billion years ago.
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 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.
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.
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.
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.
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.
Evidence for a Dark Matter Clump in the Milky Way
There are ghosts in our galaxy’s past. Now astronomers have found a way to detect them.
Primordial Chill Hints at Dark Matter Interactions in Early Universe
A simple experiment has detected a signal from the first stars forming just 180 million years after the Big Bang. The observations have intriguing implications for the nature of dark matter.
Stars Map Dark Matter in Dwarf Galaxy
A combo of Hubble and Gaia data reveal the distribution of dark matter in a tiny galaxy by tracking the galaxy’s stars.
The Origin of the Milky Way's Mysterious Gamma Rays
Our galaxy's center region is producing gamma rays, but astronomers are still debating whether pulsars or dark matter are the source. Three recent studies tackle the debate head-on.
