Cosmology

Cosmology News -- ScienceDaily Cosmology news. From deep observations of the far reaches of space and time to spectroscopic analysis and more. Read cosmology articles and consider how astronomers view the origin of the universe.

  • Filling the early universe with knots can explain why the world is three-dimensional
    on October 16, 2017 at 11:03 pm

    Filling the universe with knots shortly after it popped into existence 13.8 billion years ago provides a neat explanation for why we inhabit a three-dimensional world. That is the basic idea advanced by an out-of-the-box theory developed by an international team of physicists. […]

  • Catch a fleeting kilonova
    on October 16, 2017 at 5:26 pm

    Alerted by the first-ever gravitational waves caused by two neutron stars merging, astronomers detect the resulting optical flash. […]

  • Scientists discover more about the ingredients for star formation
    on October 10, 2017 at 2:58 pm

    In the local universe close to us, about 70 percent of the hydrogen gas is found in individual atoms, while the rest is in molecules. Astronomers had expected that as they looked back in time, younger galaxies would contain more and more molecular hydrogen until it dominated the gas in the galaxy. Instead, they found that atomic hydrogen makes up the majority of gas in younger galaxies too. […]

  • Violent helium reaction on white dwarf surface triggers supernova explosion
    on October 5, 2017 at 3:11 pm

    Astronomers have found solid evidence about what triggered a star to explode, which will contribute to a further understanding of supernova history and behavior. […]

  • NASA's Webb Telescope to witness galactic infancy
    on October 4, 2017 at 4:04 pm

    Scientists will use NASA's James Webb Space Telescope to study sections of the sky previously observed by NASA's Great Observatories, including the Hubble Space Telescope and the Spitzer Space Telescope, to understand the creation of the universe's first galaxies and stars. […]

  • Nobel Prize in Physics 2017: Gravitational waves
    on October 3, 2017 at 1:58 pm

    The Nobel Prize in Physics 2017 goes to Rainer Weiss, Barry C. Barish, and Kip S. Thorne "for decisive contributions to the LIGO detector and the observation of gravitational waves." […]

  • 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. […]

  • Bursting with starbirth
    on September 28, 2017 at 2:12 pm

    This oddly shaped galactic spectacle is bursting with brand new stars. The pink fireworks in this image taken with the NASA/ESA Hubble Space Telescope are regions of intense star formation, triggered by a cosmic-scale collision. The huge galaxy in this image, NGC 4490, has a smaller galaxy in its gravitational grip and is feeling the strain. […]

  • The strange structures of the Saturn nebula
    on September 27, 2017 at 1:33 pm

    The spectacular planetary nebula NGC 7009, or the Saturn Nebula, emerges from the darkness like a series of oddly-shaped bubbles, lit up in glorious pinks and blues. This colourful image was captured by the MUSE instrument on ESO's Very Large Telescope (VLT). The map -- which reveals a wealth of intricate structures in the dust, including shells, a halo and a curious wave-like feature -- will help astronomers understand how planetary nebulae develop their strange shapes and symmetries. […]

  • Cartography of the Cosmos
    on September 26, 2017 at 1:16 pm

    There are hundreds of billions of stars in our own Milky Way galaxy, interspersed with all manner of matter, from the dark to the sublime. This is the universe that one group of researchers is trying to reconstruct, structure by structure, combining telescope surveys with next-generation data analysis and simulation techniques currently being primed for exascale computing. […]

  • Oxygen-deficient dwarf galaxy hints at makings of early universe
    on September 25, 2017 at 5:29 pm

    Astronomers have long searched for understanding of how the universe assembled from simplicity to complexity. A newly studied tiny galaxy is providing clues. […]

  • Detecting cosmic rays from a galaxy far, far away
    on September 21, 2017 at 6:12 pm

    Where do cosmic rays come from? Solving a 50-year-old mystery, a collaboration of researchers has discovered it's much farther than the Milky Way. […]

  • Is the Milky Way an 'outlier' galaxy? Studying its 'siblings' for clues
    on September 20, 2017 at 3:33 pm

    The most-studied galaxy in the universe -- the Milky Way -- might not be as 'typical' as previously thought, according to a new study. Early results from the Satellites Around Galactic Analogs (SAGA) Survey indicate that the Milky Way's satellites are much more tranquil than other systems of comparable luminosity and environment. Many satellites of those 'sibling' galaxies are actively pumping out new stars, but the Milky Way's satellites are mostly inert. […]

  • New supernova analysis reframes dark energy debate
    on September 13, 2017 at 11:31 pm

    The accelerating expansion of the Universe may not be real, but could just be an apparent effect, according to new research. The new study finds the fit of Type Ia supernovae to a model universe with no dark energy to be very slightly better than the fit to the standard dark energy model. […]

  • Explosive birth of stars swells galactic cores
    on September 11, 2017 at 3:25 am

    Astronomers found that active star formation upswells galaxies, like yeast helps bread rise. Using three powerful telescopes on the ground and in orbit, they observed galaxies from 11 billion years ago and found explosive formation of stars in the cores of galaxies. This suggests that galaxies can change their own shape without interaction with other galaxies. […]

  • Unique study tests fundamental laws of physics
    on September 5, 2017 at 4:54 pm

    A study that will ‘test our understanding of how the Universe works, particularly outside the relatively narrow confines of our planet’ is being undertaken by an international team of researchers. […]

  • Crab nebula in the limelight: Unified model for the entire radiation spectrum
    on September 5, 2017 at 4:48 pm

    The origin of cosmic rays, high-energy particles from outer space constantly impacting on Earth, is among the most challenging open questions in astrophysics. Now research sheds new light on the origin of those energetic particles. […]

  • Stellar corpse sheds light on origin of cosmic rays
    on September 4, 2017 at 1:34 pm

    New research revealed that the entire zoo of electromagnetic radiation streaming from the Crab nebula -- one of the most iconic objects in the sky -- has its origin in one population of electrons and must be produced in a different way than scientists have traditionally thought. The results have implications for our understanding of how cosmic rays attain their incredible energies. […]

  • Physicists propose new theories of black holes from the very early universe
    on September 1, 2017 at 5:55 pm

    'Primordial black holes,' believed to have formed shortly after the Big Bang, might explain how heavy elements such as gold, platinum and uranium came to be, physicists report. […]

  • Star-formation ‘fuel tanks’ found around distant galaxies
    on August 30, 2017 at 9:25 pm

    Astronomers have studied six distant starburst galaxies and discovered that five of them are surrounded by turbulent reservoirs of hydrogen gas, the fuel for future star formation. […]

  • Artificial intelligence analyzes gravitational lenses 10 million times faster
    on August 30, 2017 at 5:22 pm

    Researchers have for the first time shown that neural networks -- a form of artificial intelligence -- can accurately analyze the complex distortions in spacetime known as gravitational lenses 10 million times faster than traditional methods. […]

  • What lit up the universe? Black holes may have punctured darkened galaxies, allowing light to escape
    on August 30, 2017 at 3:48 pm

    Researchers have a new explanation for how the universe changed from darkness to light. They propose that black holes within galaxies produce winds strong enough to fling out matter that punctures holes in galaxies, allowing light to escape. […]

  • Galaxy 5 billion light-years away shows we live in a magnetic universe
    on August 28, 2017 at 4:45 pm

    A chance combination of a gravitational lens and polarized waves coming from a distant quasar gave astronomers the tool needed to make a measurement important to understanding the origin of magnetic fields in galaxies. […]

  • Cosmic velocity web: Motions of thousands of galaxies mapped
    on August 15, 2017 at 1:51 pm

    The cosmic web -- the distribution of matter on the largest scales in the universe -- has usually been defined through the distribution of galaxies. Now, a new study by a team of astronomers demonstrates a novel approach. Instead of using galaxy positions, they mapped the motions of thousands of galaxies. […]

  • Where is everybody? The implications of cosmic silence
    on August 11, 2017 at 10:54 pm

    If the potential for intelligent life to exist somewhere in the universe is so large, then where is everybody? In a new paper, an astrophysicist argues that species such as ours go extinct soon after attaining high levels of technology. […]

  • New theory on the origin of dark matter
    on August 8, 2017 at 6:59 pm

    Scientists have come up with a new theory on how dark matter may have been formed shortly after the origin of the universe. This new model proposes an alternative to the WIMP paradigm that is the subject of various experiments in current research. […]

  • Scientists probe the conditions of stellar interiors to measure nuclear reactions
    on August 7, 2017 at 8:44 pm

    Most of the nuclear reactions that drive the nucleosynthesis of the elements in our universe occur in very extreme stellar plasma conditions. This intense environment found in the deep interiors of stars has made it nearly impossible for scientists to perform nuclear measurements in these conditions -- until now. […]

  • Primordial black holes may have helped to forge heavy elements
    on August 4, 2017 at 5:18 pm

    Astronomers like to say we are the byproducts of stars, stellar furnaces that long ago fused hydrogen and helium into the elements needed for life through the process of stellar nucleosynthesis. But what about the heavier elements in the periodic chart, elements such as gold, platinum and uranium? Astronomers believe most of these "r-process elements" -- elements much heavier than iron -- were created, either in the aftermath of the collapse of massive stars and the associated supernova explosions, or in the merging of binary neutron star systems. […]

  • Possible explanation for the dominance of matter over antimatter in the Universe
    on August 4, 2017 at 12:31 pm

    Neutrinos and antineutrinos, sometimes called ghost particles because difficult to detect, can transform from one type to another. The international T2K Collaboration announces a first indication that the dominance of matter over antimatter may originate from the fact that neutrinos and antineutrinos behave differently during those oscillations. This is an important milestone towards the understanding of our Universe. […]

  • First observation of the hyperfine splitting in antihydrogen
    on August 3, 2017 at 4:27 pm

    Scientists are one step closer to answering the question of why matter exists and illuminating the mysteries of the Big Bang and the birth of the universe. […]