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E.g., 04/22/2018
E.g., 04/22/2018
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  • Gray Rybka
  • Abell 3827
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Your search has returned 139 articles:
  • News

    The search for mysterious dark matter underdogs steps up

    Scientists playing peekaboo with dark matter have entered a new stage of the game.

    For the first time, physicists are snooping on some of the likeliest hiding places for hypothetical subatomic particles called axions, which could make up dark matter. So far, no traces of the particles have been found, scientists with the Axion Dark Matter Experiment, ADMX, report April 9 in Physical...

    04/09/2018 - 11:00 Particle Physics, Cosmology
  • News in Brief

    Dark matter isn’t interacting with itself after all

    Dark matter is still the shyest particle in physics. New observations show that dark matter in galaxy cluster Abell 3827 stubbornly ignores all other kinds of matter — including itself, astronomers reported April 6 at the European Week of Astronomy and Space Science in Liverpool, England.

    The research, also posted online at arXiv.org, negates an earlier finding that stars were separated...

    04/05/2018 - 19:05 Astronomy, Cosmology
  • Reviews & Previews

    Why the Nobel Prize might need a makeover

    Losing the Nobel PrizeBrian KeatingW.W. Norton & Co., $27.95

    Dust may seem insignificant, but in science, it can cost you a Nobel Prize.

    That’s what happened to Brian Keating, a major contributor to the BICEP2 team that claimed in 2014 to have found the first definitive evidence of cosmic inflation (SN: 4/5/14, p. 6), a period of extremely rapid expansion just after the...

    04/02/2018 - 09:00 Cosmology, History of Science, Astronomy
  • News

    Dark matter is MIA in this strange galaxy

    MISSING: Dark matter.

    Mass: About 60 billion suns’ worth.

    Location: The galaxy NGC1052–DF2, about 65 million light-years from Earth.

    An unusual galaxy is surprisingly lacking in dark matter, scientists report March 28 in Nature.

    In typical galaxies, normal matter is swamped by dark matter, an unidentified invisible substance that makes up most of the matter in the...

    03/28/2018 - 13:00 Astronomy, Particle Physics, Cosmology
  • News in Brief

    Renowned physicist Stephen Hawking dies at 76

    Physicist Stephen Hawking, a black hole whisperer who divined secrets of the universe’s most inscrutable objects, died March 14 at age 76. In addition to his scientific research, Hawking, a professor at the University of Cambridge, was known for his popular science books, including the best-selling A Brief History of Time, which captivated readers with lucid explanations of the universe’s...

    03/14/2018 - 10:06 Cosmology, Physics
  • News

    Here’s when the universe’s first stars may have been born

    For the first time, scientists may have detected hints of the universe’s primordial sunrise, when the first twinkles of starlight appeared in the cosmos.  

    Stars began illuminating the heavens by about 180 million years after the universe was born, researchers report in the March 1 Nature. This “cosmic dawn” left its mark on the hydrogen gas that surrounded the stars (SN: 6/8/02, p. 362...

    02/28/2018 - 13:00 Cosmology, Astronomy
  • Context

    Remembering Joe Polchinski, the modest physicist who conceived a multiverse

    Modesty is not a quality often found in abundance in physicists. Maybe that’s because Joe Polchinski had all of it.

    Substantial ego is arguably a necessary qualification for anyone attempting to wrest nature’s deepest secrets from their mathematical lairs. And in many cases, ego seems proportional to the magnitude of a physicist’s accomplishments. But if you divided Polchinski’s...

    02/27/2018 - 15:01 Cosmology, History of Science
  • News

    The way dwarf galaxies move puts a new spin on galaxy formation

    Small galaxies are playing a game of ring around the rosie. Dwarf galaxies have been caught following each other around the distant galaxy Centaurus A in a coordinated loop, rather than zipping around randomly as theory predicts they should.

    The discovery could spell trouble for standard theories of cosmology, including the role of enigmatic dark matter in galaxy formation, astronomers...

    02/05/2018 - 18:00 Cosmology
  • News

    Universes with no weak force might still have stars and life

    Not all fundamental forces are created equal. An alternate universe that lacks the weak nuclear force — one of the four fundamental forces that govern all matter in our universe — could still form galaxies, stars, planets and perhaps life, according to calculations published online January 18 at arXiv.org.

    Scientists have long thought that our universe wouldn’t exist, or at least wouldn’...

    01/30/2018 - 07:00 Astronomy, Cosmology, Particle Physics
  • News

    Clumps of dark matter could be lurking undetected in our galaxy

    Clumps of dark matter may be sailing through the Milky Way and other galaxies.

    Typically thought to form featureless blobs surrounding entire galaxies, dark matter could also collapse into smaller clumps — similar to normal matter condensing into stars and planets — a new study proposes. Thousands of collapsed dark clumps could constitute 10 percent of the Milky Way’s dark matter,...

    01/26/2018 - 09:00 Particle Physics, Cosmology