Dark Matter

Dark Matter News -- ScienceDaily Dark Matter and Dark Energy. Read what astronomers are discovering about a gaping hole in the universe, how dark matter clumps contribute to galaxy formation and more. Space images.

  • Astronomers reveal secrets of most distant supernova ever detected
    on February 20, 2018 at 3:24 pm

    Astronomers have confirmed the discovery of the most distant supernova ever detected -- a huge cosmic explosion that took place 10.5 billion years ago, or three-quarters the age of the Universe itself. […]

  • The starry sky shows nocturnal animals the way
    on February 19, 2018 at 3:39 pm

    Nocturnal animals can use the stars and the Milky Way to find their way during the darkest hours. […]

  • Hubble sees Neptune's mysterious shrinking storm
    on February 15, 2018 at 6:11 pm

    Three billion miles away on the farthest known major planet in our solar system, an ominous, dark storm -- once big enough to stretch across the Atlantic Ocean from Boston to Portugal -- is shrinking out of existence as seen in pictures of Neptune taken by NASA's Hubble Space Telescope. […]

  • Cosmic x-rays may provide clues to the nature of dark matter
    on February 8, 2018 at 3:42 pm

    Researchers have presented a novel theory of dark matter, which implies that dark matter particles may be very different from what is normally assumed. In particular, their theory involves dark matter particles which are extremely light -- almost one hundred times lighter than electrons, in stark contrast to many conventional models that involve very heavy dark matter particles instead. […]

  • Cosmic dust snakes and starbirth in Lupus 3
    on January 31, 2018 at 2:03 pm

    A dark cloud of cosmic dust snakes across this spectacular wide field image, illuminated by the brilliant light of new stars. This dense cloud is a star-forming region called Lupus 3, where dazzlingly hot stars are born from collapsing masses of gas and dust. […]

  • Chasing dark matter with oldest stars in the Milky Way
    on January 24, 2018 at 3:03 pm

    Just how quickly is the dark matter near Earth zipping around? The speed of dark matter has far-reaching consequences for modern astrophysical research, but this fundamental property has eluded researchers for years. Researchers have now provided the first clue: The solution to this mystery, it turns out, lies among some of the oldest stars in the galaxy.&nbs […]

  • North, east, south, west: The many faces of Abell 1758
    on January 18, 2018 at 7:26 pm

    Resembling a swarm of flickering fireflies, this beautiful galaxy cluster glows intensely in the dark cosmos, accompanied by the myriad bright lights of foreground stars and swirling spiral galaxies. A1758N is a sub-cluster of Abell 1758, a massive cluster containing hundreds of galaxies. Although it may appear serene in this NASA/ESA Hubble Space Telescope image, the sub-cluster actually comprises two even smaller structures currently in the turbulent process of merging. […]

  • Hubble weighs in on mass of 3 million billion suns
    on January 16, 2018 at 7:42 pm

    In 2014, astronomers found an enormous galaxy cluster contains the mass of a staggering three million billion suns -- so it's little wonder that it has earned the nickname of "El Gordo" ("the Fat One" in Spanish)! Known officially as ACT-CLJ0102-4915, it is the largest, hottest, and brightest X-ray galaxy cluster ever discovered in the distant Universe. […]

  • New stellar streams confirm 'melting pot' history of the galaxy
    on January 10, 2018 at 7:13 pm

    Where do the stars in our Galaxy come from? All the stars we see in the night-time sky belong to our Milky Way galaxy, and while most stars were likely born here, in the Milky Way, many appear to have originated in other galaxies and migrated to our shores. Tell-tale evidence comes from streams of stars created when small galaxies interact with the Milky Way. […]

  • 'Cosmic lantern' could help us further understand the fate of the universe
    on December 21, 2017 at 3:13 pm

    New research has provided a deeper insight into emission line galaxies, used in several ongoing and upcoming surveys, to help us further understand the composition and fate of the universe. […]

  • Star mergers: A new test of gravity, dark energy theories
    on December 18, 2017 at 6:13 pm

    Observations and measurements of a neutron star merger have largely ruled out some theories relating to gravity and dark energy, and challenged a large class of theories. […]

  • Doing without dark energy
    on December 14, 2017 at 3:08 pm

    Three mathematicians have a different explanation for the accelerating expansion of the universe that does without theories of 'dark energy.' Einstein's original equations for General Relativity actually predict cosmic acceleration due to an 'instability,' they argue in a new paper. […]

  • Galaxy growth in a massive halo in the first billion years of cosmic history
    on December 7, 2017 at 7:07 pm

    Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought. […]

  • Heavy metal: How first supernovae altered early star formation
    on December 6, 2017 at 7:23 pm

    An international team of researchers ran multi-scale, multi-physics 2-D and 3-D simulations to illustrate how heavy metals expelled from exploding supernovae held the first stars in the universe regulate subsequent star formation and influence the appearance of galaxies in the process. […]

  • ALMA finds massive primordial galaxies swimming in vast ocean of dark matter
    on December 6, 2017 at 6:20 pm

    New observations push back the epoch of massive-galaxy formation even further by identifying two giant galaxies seen when the universe was only 780 million years old, or about 5 percent its current age. […]

  • How does it look when Earth is bombarded with dark matter?
    on December 6, 2017 at 5:25 pm

    A whole lot of zig-zagging: Perhaps that is what happens when the universe's mysterious dark matter particles hit the Earth. Researchers can now show through simulations how it might look. […]

  • MACHOs are dead, WIMPs are a no-show -- say hello to SIMPs
    on December 4, 2017 at 9:23 pm

    The nature of dark matter remains elusive, with numerous experimental searches for WIMPs coming up empty-handed and MACHOs all but abandoned. Theorists have proposed a different type of dark matter particle, a strongly interacting massive particle or SIMP, that differs from WIMPs in that they interact strongly with one another and hardly at all with normal matter. The dark matter structure of a galaxy pile-up could be evidence for SIMPs. […]

  • Gravitational waves could shed light on the origin of black holes
    on November 30, 2017 at 7:10 pm

    The detection of gravitational waves has given astronomers a new way of looking at the universe, and a new study shows how these ripples in the fabric of spacetime might confirm or rule out the existence of a certain type of black hole. […]

  • First proper motions measured of stars in a small galaxy outside the Milky Way
    on November 27, 2017 at 5:47 pm

    By combining data from the Hubble Space Telescope and the Gaia mission, astronomers have been able to measure the proper motion of 15 stars in the Sculptor Galaxy, the first such measurement outside the Milky Way. Analysis shows an unexpected preference in the direction of movement, which suggests that the standard theoretical models used to describe the motion of stars and dark matter halos in other galaxies might be invalid. […]

  • Dark matter and dark energy: Do they really exist?
    on November 22, 2017 at 4:30 pm

    Researchers have hypothesized that the universe contains a 'dark matter.' They have also posited the existence of a 'dark energy.' These two hypotheses account for the movement of stars in galaxies and for the accelerating expansion of the universe. But, according to a researcher, these concepts may be no longer valid: the phenomena can be demonstrated without them. This research exploits a new theoretical model based on the scale invariance of the empty space. […]

  • On the origins of star stuff: Shedding new light on origin of anti-matter
    on November 16, 2017 at 7:20 pm

    Astronomers have used a high-altitude observatory in Mexico to better understand where gamma rays come from. More than 300 massive water tanks sit waiting at the site for cascades of particles initiated by high-energy packets of light called gamma rays -- many of which have more than a million times the energy of a dental X-ray. When these gamma rays smash into the upper atmosphere, they blast apart atoms in the air, producing a shower of particles that moves at nearly the speed of light toward the ground. When this shower reaches HAWC's tanks, it produces coordinated flashes of blue light in the water, allowing researchers to reconstruct the energy and cosmic origin of the gamma ray that kicked off the cascade. […]

  • Hunt for dark matter is narrowed
    on November 15, 2017 at 5:46 pm

    Scientists have disproved the existence of a specific type of axion -- an important candidate 'dark matter' particle -- across a wide range of its possible masses. […]

  • First direct measurements of high energy electrons in space
    on November 3, 2017 at 2:58 pm

    The CALET Cosmic Ray experiment has successfully carried out the high-precision measurement of cosmic-ray electron spectrum up to 3 tera electron volts (TeV) by using the CALorimetric Electron Telescope (CALET) on the Japanese Experimental Module, the Exposed Facility on the International Space Station. […]

  • Shedding light on the mystery of matter accretion in young stars
    on November 2, 2017 at 10:03 pm

    Astronomers are shedding light on the mystery of matter accretion in young stars. Their discovery helps explain how matter accumulates on the surface of a young star and reconciles the theory behind and observations on the accretion process -- a matter of debate among astrophysicists because of the limited number of theoretical models and actual observations. […]

  • One step closer to defining dark matter, GPS satellite atomic clocks on the hunt
    on November 1, 2017 at 5:03 pm

    One professor who studies the earth and one who studies space came together in the pursuit to detect and define dark matter. They are one step closer. Using 16 years of archival data from GPS satellites that that orbit the earth, the team looked for dark matter clumps in the shape of walls or bubbles and which would extend far out beyond the GPS orbits, the solar system and beyond. […]

  • Newest dark matter map hints at where astrophysics must go for breakthroughs
    on October 31, 2017 at 5:03 pm

    Three astrophysicists -- Scott Dodelson, Risa Wechsler and George Efstathiou -- recently participated in a roundtable discussion, hosted by The Kavli Foundation, about new data from the Dark Energy Survey and its implications for understanding the universe's history. […]

  • Wobbling galaxies: New evidence for dark matter makes it even more exotic
    on October 26, 2017 at 2:31 pm

    Astronomers have discovered that the brightest galaxies within galaxy clusters 'wobble' relative to the cluster's center of mass. This unexpected result is inconsistent with predictions made by the current standard model of dark matter. With further analysis it may provide insights into the nature of dark matter, perhaps even indicating that new physics is at work. […]

  • Astronomers find potential solution into how planets form
    on October 13, 2017 at 4:32 pm

    The quest to discover how planets found in the far reaches of the universe are born has taken a new, crucial twist. […]

  • Astronomers reveal evidence of dynamical dark energy
    on October 3, 2017 at 3:10 pm

    Astronomers found that the nature of dark energy may not be the cosmological constant introduced by Albert Einstein 100 years ago. This is crucial for the study of dark energy. […]

  • Supersonic gas streams left over from the Big Bang drive massive black hole formation
    on September 28, 2017 at 6:20 pm

    A super-computer simulation by an international team of researchers has shown the formation of a rapidly growing star from supersonic gas streams in the early universe left over from the Big Bang. The star ends its life with catastrophic collapse to leave a black hole with a mass of 34,000 times that of the Sun. […]