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Dark Matter

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    1. Dark Energy
    2. Antimatter
    3. General Relativity
    4. Fermi Gamma-ray Space Telescope
    5. Atomic and Molecular Physics
    6. Space Physics
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    Smallest ever galaxy found

    An ultra-faint collection of 1,000 stars orbiting the Milky Way is the most lightweight galaxy ever discovered, scientists say.The dwarf galaxy known as Segue 2 is bound together by a tiny clump of dark matter. Scientists who measured it using Hawaii's Keck Observatory say the finding adds support to theories about the formation of the universe.Models predict that the outskirts of our cosmic neighborhood should be teeming with tiny galaxies, but scientists have found far fewer satellite dwarf galaxies in the Local Group than they expected.Astronomers' inability to measure these cosmic bodies "has been a major puzzle, suggesting that perhaps our theoretical understanding of structure formation in the universe was flawed in a serious way," said study researcher James Bullock, a University of California, Irvine cosmologist."Finding a galaxy as tiny as Segue 2 is like discovering an elephant smaller than a mouse," Bullock added in a statement.Segue 2 has a luminosity just 900 times that of...

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    1. Dark Matter Contest Enlists the Masses

      The nature of dark matter has stumped astronomers for decades, so now they're turning to the masses for help.Scientists have launched a public competition in an atte...

    2. Giant Strand of Elusive Dark Matter Seen in 3D

      Astronomers have taken their first 3D look at a gigantic filament of dark matter, an invisible cosmic structure that can only be detected by its gravitational effect...

    3. Mystery Glow of Dark Matter Halos Fueled by Extragalactic Stars

      Stars ripped from their home galaxies as they collide with other galaxies can get slung into giant invisible cocoons of dark matter, researchers say, which might exp...

    4. One mile beneath the earth, dark matter detector nears activation in gold mine

      Scientists hoping to detect dark matter deep in a former South Dakota gold mine have taken the last major step before flipping the switch on their painstakingly deli...

    5. Search for Dark Matter Particles Turns Up Zilch

      The most sensitive search yet for the elusive particles that may make up dark matter has turned up nothing, putting stronger limits than ever on the ingredients of n...

    6. Dark Matter May Collide With Atoms Inside You More Often Than Thought

      Invisible dark matter particles may regularly pass through our bodies, and dozens to thousands of these particles may be colliding with atoms inside us every year, a...

    7. Dwarf Galaxies Help to Unlock Secrets of Dark Matter

      ATLANTA — While scientists still don't know what makes up the mysterious dark matter thought to dominate the universe, a new study of dwarf galaxies orbiting the Mil...

    8. Dark Matter Theories Challenged By Satellite Galaxy Discovery

      A sprawling collection of galaxies and star clusters surrounding our own Milky Way is challenging long-standing theories on the existence of dark matter, the mysteri...

    9. Milky Way 'Haze' May Be Dark Matter Signature

      Strange radiation streaming from the core of our Milky Way galaxy may be a long-sought signal of dark matter, the elusive stuff thought to make up much of the univer...

    10. Higgs Boson Particle Discovery May Help Reveal Dark Matter Secrets

      The discovery of a new subatomic particle that is likely the elusive Higgs boson — a particle thought to give all other matter its mass — could be an important step ...

    11. Giant dark matter bridge between galaxies clusters discovered

      A giant string of invisible dark matter has been discovered across the universe between a pair of galaxy clusters.The filament forms a bridge between two huge cluste...

    12. Hidden substance that makes up the universe possibly found

      A massive particle detector mounted on the International Space Station may have detected elusive dark matter at last, scientists announced Wednesday.The detector, th...

    1. Has dark matter finally been found?

      Big news in the search for dark matter may be coming in about two weeks, the leader of a space-based particle physics experiment said Sunday at the annual meeting of...

    2. Experiment finds building block of 'dark matter'?

      Results from $2 billion cosmic ray detector on International Space Station

    3. Scientists find hint of dark matter from cosmos

      A $2 billion experiment on the International Space Station is on the verge of explaining one of the more mysterious building blocks of the universe: The dark matter ...

    4. New gadget can recharge a cell phone in 30 seconds

      Your dead battery will be gone in 60 seconds.A new device can fit inside a cell phone's battery and recharge it fully in less than half a minute. Is it the latest fr...

    5. Dark Matter Mystery May Soon Be Solved

      The hiding spots for the particles making up dark matter are narrowing, and the answer to this cosmic mystery could come within the next three or four years, scienti...

    6. Invisible Dark Matter Likely Bountiful Near Sun

      The area around our sun is probably rife with dark matter, the pervasive invisible stuff that populates the universe, a new study suggests.Dark matter is thought to ...

    7. Dark Matter Exposed? Gamma-Ray Find Excites Scientists

      Energetic light seen radiating from the center of the Milky Way may be the best evidence yet of dark matter, the invisible stuff thought to be hiding throughout the ...

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