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.

  • 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. […]

  • Dark Energy Survey reveals most accurate measurement of universe's dark matter
    on August 3, 2017 at 4:06 pm

    Dark Energy Survey scientists have unveiled the most accurate measurement ever made of the present large-scale structure of the universe. These measurements of the amount and 'clumpiness' (or distribution) of dark matter in the present-day cosmos were made with a precision that, for the first time, rivals that of inferences from the early universe by the European Space Agency's orbiting Planck observatory. […]

  • New simulations could help in hunt for massive mergers of neutron stars, black holes
    on August 2, 2017 at 5:47 pm

    Scientists have developed new computer models to explore what happens when a black hole joins with a neutron star - the superdense remnant of an exploded star. […]

  • Running out of gas: Gas loss puts breaks on stellar baby boom
    on August 2, 2017 at 12:33 pm

    Understanding the history of star formation in the Universe is a central theme in modern astronomy. Various observations have shown that the star formation activity has varied through the 13.8 billion-year history of the Universe. The stellar birthrate peaked around 10 billion years ago, and has declined steadily since then. However, the cause of the declining stellar birthrate is still not well understood. […]

  • Quasars may answer how starburst galaxies were extinguished
    on July 31, 2017 at 1:54 pm

    Astronomers have located quasars inside four dusty starburst galaxies. The observations suggest quasars may starve this type of galaxy of energy needed to form stars. […]

  • Glittering stars: Spiral galaxy NGC 4248
    on July 28, 2017 at 5:36 pm

    This beautiful clump of glowing gas, dark dust and glittering stars is the spiral galaxy NGC 4248, located about 24 million light-years away in the constellation of Canes Venatici (The Hunting Dogs). […]

  • Milky Way's origins are not what they seem
    on July 27, 2017 at 6:18 pm

    Up to half of the matter in our Milky Way galaxy may come from distant galaxies, astrophysicists have discovered in a first-of-its-kind analysis. As a result, each one of us may be made in part from extragalactic matter. Using supercomputer simulations, the researchers found an unexpected mode for how galaxies acquired matter: intergalactic transfer. Supernova explosions eject copious amounts of gas from galaxies, causing atoms to be transported from one galaxy to another via powerful galactic winds. […]

  • Dawn of the cosmos: Seeing galaxies that appeared soon after the Big Bang
    on July 26, 2017 at 6:33 pm

    Astronomers have discovered 23 young galaxies, seen as they were 800 million years after the Big Bang. […]

  • Cosmologists produce new maps of dark matter dynamics
    on July 25, 2017 at 4:21 pm

    New maps of dark matter dynamics in the Universe have been produced by a team of international cosmologists, outlines a new report. […]

  • Construction of massive neutrino experiment kicks off a mile underground
    on July 24, 2017 at 8:21 pm

    A new era in international particle physics research officially began July 21 with a unique groundbreaking held a mile underground at the Sanford Underground Research Facility in South Dakota. Dignitaries, scientists and engineers from around the world marked the start of construction of a massive international experiment that could change our understanding of the universe. The Long-Baseline Neutrino Facility (LBNF) will house the international Deep Underground Neutrino Experiment (DUNE), which will be built and operated by roughly 1,000 scientists and engineers from 30 countries. […]

  • Superluminous supernova marks the death of a star at cosmic high noon
    on July 21, 2017 at 4:25 pm

    The death of a massive star in a distant galaxy 10 billion years ago created a rare superluminous supernova, one of the most distant ever discovered. The brilliant explosion, more than three times as bright as the 100 billion stars of our Milky Way galaxy combined, occurred about 3.5 billion years after the big bang at a period known as 'cosmic high noon,' when the rate of star formation in the universe reached its peak. […]

  • Flashes of light on dark matter
    on July 21, 2017 at 2:13 pm

    A web that passes through infinite intergalactic spaces, a dense cosmic forest illuminated by very distant lights and a huge enigma to solve. These are the picturesque ingredients of a scientific research that adds an important element for understanding one of the fundamental components of our Universe: dark matter. […]

  • Best measure of star-forming material in galaxy clusters in early universe
    on July 20, 2017 at 5:31 pm

    The international Spitzer Adaptation of the Red-sequence Cluster Survey (SpARCS) collaboration has combined observations from several of the world's most powerful telescopes to carry out one of the largest studies yet of molecular gas -- the raw material which fuels star formation throughout the universe -- in three of the most distant clusters of galaxies ever found, detected as they appeared when the universe was only four billion years old. […]

  • Smallest particles and the vastness of the universe connected
    on July 19, 2017 at 3:35 pm

    Are density distributions of the vast universe and the nature of smallest particles related? Scientists have now revealed the connection between those two aspects, and argued that our universe could be used as a particle physics 'collider' to study the high energy particle physics. Their findings mark the first step of cosmological collider phenomenology and pave the way for future discovery of new physics unknown yet to humankind. […]

  • Shedding light on Galaxies' rotation secrets
    on July 13, 2017 at 7:48 pm

    Spiral galaxies are found to be strongly rotating, with an angular momentum higher by a factor of about 5 than ellipticals. In a new study, the researchers have traced back the dichotomy in the angular momentum of spiral and elliptical galaxies to their different formation history. In particular, the low angular momentum of ellipticals is mainly originated by nature in the central regions during the early galaxy formation process. […]

  • Hubble pushed beyond limits to spot clumps of new stars in distant galaxy
    on July 6, 2017 at 7:59 pm

    By applying a new computational analysis to a galaxy magnified by a gravitational lens, astronomers have obtained images 10 times sharper than what Hubble could achieve on its own. […]

  • How to make 'your own supernova'
    on July 6, 2017 at 4:50 pm

    Researchers are using the largest, most intense lasers on the planet, to for the first time, show the general public how to recreate the effects of supernovae, in a laboratory. […]

  • Dazzling spiral with an active heart: Barred spiral galaxy Messier 77
    on July 5, 2017 at 2:40 pm

    ESO's Very Large Telescope (VLT) has captured a magnificent face-on view of the barred spiral galaxy Messier 77. The image does justice to the galaxy's beauty, showcasing its glittering arms criss-crossed with dust lanes -- but it fails to betray Messier 77's turbulent nature. […]

  • 'Little Cub' gives astronomers rare chance to see galaxy demise
    on July 4, 2017 at 1:36 pm

    A primitive galaxy that could provide clues about the early universe has been spotted by astronomers as it begins to be consumed by a gigantic neighboring galaxy. […]

  • Does dark matter annihilate quicker in the Milky Way?
    on June 23, 2017 at 2:04 pm

    A new theory predicts how dark matter may be annihilating much more rapidly in the Milky Way, than in smaller or larger galaxies and the early Universe. […]

  • Massive dead disk galaxy challenges theories of galaxy evolution
    on June 21, 2017 at 6:51 pm

    By combining the power of a 'natural lens' in space with the capability of NASA's Hubble Space Telescope, astronomers made a surprising discovery -- the first example of a compact yet massive, fast-spinning, disk-shaped galaxy that stopped making stars only a few billion years after the big bang. […]

  • A unique data center for cosmological simulations
    on June 20, 2017 at 3:41 pm

    Scientists have established 'Cosmowebportal', a unique data center for cosmological simulations. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results. […]

  • Galaxy alignments traced back 10 billion years
    on June 13, 2017 at 3:16 pm

    The most massive galaxies in the universe have been aligned with their surroundings for at least ten billion years. This discovery shows that galaxies, like people, are influenced by their environment from a young age. […]

  • New strategy to search for ancient black holes
    on June 13, 2017 at 2:29 pm

    An interdisciplinary team of physicists and astronomers has devised a new strategy to search for 'primordial' black holes produced in the early universe. Such black holes are possibly responsible for the gravitational wave events observed by the Laser Interferometer Gravitational-Wave Observatory. […]