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Dark Matter

HADES at the GSI in Darmstadt/Germany searches for dark matter candidates (Image: A. Schma...

Scientists at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR) in Dresden, Germany have analyzed data from the HADES particle detector and concluded that the so-called "dark photons" are not the constituents of dark matter. Dark photons, or U bosons, are hypothetical particles that had thus far been the main candidate for that role, and this new result could make the search for the dark matter particle even more challenging than before.  Read More

Illustris simulation still frame centered on the most massive galaxy cluster existing toda...

As you might expect, the scale and complexities of the underlying physics means creating a realistic virtual universe would require some hefty computing power. A team of astronomers is claiming to have achieved this impressive feat using a computer simulation called "Illustris," which took five years to program and, for the first time, can recreate the evolution of the Universe in high fidelity.  Read More

A whole sky picture of the Milky Way galaxy as seen in gamma-ray light (Photo: NASA)

New analyses of the x-ray and gamma-ray emissions from the center of the Milky Way galaxy, the Andromeda galaxy, and the Perseus galaxy cluster have detected significant signs of two possible dark matter particles. One is likely a 7.1 keV sterile neutrino, and the other appears to be a 35 GeV WIMP (Weakly Interacting Massive Particle).  Read More

The ANU SkyMapper telescope at the Siding Spring Observatory has discovered the oldest kno...

A team of astronomers at The Australian National University (ANU) working on a five-year project to produce the first comprehensive digital survey of the southern sky has discovered the oldest known star in the Universe. Just a 6,000 light year astronomical hop, skip and jump from Earth, the ancient star formed shortly after the Big Bang 13.7 billion years ago.  Read More

Astrophoto in redshifted Lyman-alpha light, possibly emitted by a cosmic filament of gas a...

That the Universe is largely composed of a cosmic web consisting of narrow filaments upon which galaxies and intergalactic gas and dust are concentrated has been known for more than a decade. While a great deal of evidence for this has accumulated, visual evidence has been difficult to find. Astronomers have now photographed what appears to be a segment of a cosmic filament stimulated into fluorescence by irradiation from a nearby quasar.  Read More

The spherical middle chamber of DarkSide-50 is filled with 7,000 gal of scintillator fluid

Like the Higgs Boson, dark matter is one of those things in the Universe that evidence points to, but is very difficult to pin down. A team of researchers is looking to verify the existence of this most elusive of ingredients that is thought to make up 23 percent of the Universe using powerful detectors buried deep in an Italian mountain.  Read More

Looking back on a year filled with scientific accomplishment

The close of 2013 gives us an excellent opportunity, though satiated with holiday feasts, to look back on a year that has been filled with scientific accomplishment. So it's time to get comfortable on your Binary Chair, sip your hot cocoa from a phase-change mug while your Foodini prints out a batch of cookies and reflect on science stories of note from the past year.  Read More

A cross-sectional view of the LUX dark matter detector (Image: LUX)

The Large Underground Xenon experiment, buried nearly a mile beneath South Dakota, has completed 85 days of seeking dark matter particles. The results are consistent with a null result, and essentially rule out the 8.6 GeV dark matter candidate noted in the data of other experiments.  Read More

The HSC captured a high-resolution image of the entire Andromeda galaxy in one go (Image: ...

When taking snapshots, a good telephoto lens can be handy, but when your subject is 2.5 million light years away, it’s invaluable. To show off the capabilities of the new Hyper-Suprime Cam (HSC) located on Mauna Kea, Hawaii, an international team of astrophysicists has released high resolution images of the Andromeda galaxy that not only show off incredible detail, but may help shed light on the evolution of the Universe and the distribution of dark matter.  Read More

Abell 222/223 galaxies, showing a filament of dark matter stretching between the two galax...

Recently the media has been saturated with overly-hyped reports that NASA's Alpha Magnetic Spectrometer (AMS) may have detected dark matter. These claims may have some justification if the word "may" is shouted, but they rest on a number of really major assumptions and guesses, some of which are on weak and shifting soil. So just what was seen in the experiment, and what are the possible explanations?  Read More

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