Galaxies

Galaxies News -- ScienceDaily News and research on the formation of galaxies. From the Milky Way to Andromeda Galaxy, see astronomy images of splendid galaxies in the universe. Read the latest research discoveries.

  • Measurement promises complete picture of Milky Way
    on October 12, 2017 at 6:34 pm

    Distance measured out to the far side of our Milky Way means that radio astronomers now can work on producing an accurate map of the full extent of our galaxy's structure for the first time. […]

  • Scientists discover one of the most luminous 'new stars' ever
    on October 11, 2017 at 4:03 pm

    Astronomers have discovered possibly the most luminous 'new star' ever -- a nova discovered in the direction of one of our closest neighboring galaxies: The Small Magellanic Cloud. […]

  • 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. […]

  • 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. […]

  • 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. […]

  • Black holes with ravenous appetites define Type I active galaxies
    on September 27, 2017 at 5:36 pm

    Type I and Type II active galaxies do not just appear different -- they are, in fact, very different from each other, both structurally and energetically, new research shows. According to the results of a new study, the key factor that distinguishes Type I and Type II galaxies is the rate at which their central black holes -- or active galactic nuclei -- consume matter and spit out energy. […]

  • 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. […]

  • The material that obscures supermassive black holes
    on September 25, 2017 at 5:29 pm

    New research examines the material that obscures active galactic nuclei obtained from infrared and X-ray observations. […]

  • 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. […]

  • 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. […]

  • When radio galaxies collide, supermassive black holes form tightly bound pairs
    on September 18, 2017 at 4:35 pm

    Supermassive black holes found in the centers of galaxies can form gravitationally bound pairs when galaxies merge, according to a new study. […]

  • Physicists offer explanation for diverse galaxy rotations
    on September 14, 2017 at 7:22 pm

    Physicists have found a simple and viable explanation for the diversity observed in galactic rotations. They report that diverse galactic-rotation curves, a graph of rotation speeds at different distances from the center, can be naturally explained if dark matter particles are assumed to strongly collide with one another in the inner halo, close to the galaxy's center -- a process called dark matter self-interaction. […]

  • Astronomers spun up by galaxy-shape finding
    on September 11, 2017 at 4:26 pm

    For the first time astronomers have measured how a galaxy's spin affects its shape -- something scientists have tried to do for 90 years -- using a sample of 845 galaxies. Because a galaxy's shape is the result of past events such as merging with other galaxies, knowing its shape also tells us about the galaxy's history. The team made its findings with SAMI (the Sydney-AAO Multi-object Integral field unit), a game-changing instrument. […]

  • 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. […]

  • Does the organic material of comets predate our solar system?
    on September 6, 2017 at 3:46 pm

    The Rosetta space probe discovered a large amount of organic material in the nucleus of comet 'Chury.' Researchers now advance the theory that this matter has its origin in interstellar space and predates the birth of the solar system. […]

  • Accretion-powered pulsar reveals unique timing glitch
    on September 6, 2017 at 2:36 pm

    The discovery of the largest timing irregularity yet observed in a pulsar is the first confirmation that pulsars in binary systems exhibit the strange phenomenon known as a 'glitch.' […]

  • 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. […]

  • 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. […]

  • Black holes: Scientists 'excited' by observations suggesting formation scenarios
    on August 23, 2017 at 5:12 pm

    Physicists have described how observations of gravitational waves limit the possible explanations for the formation of black holes outside of our galaxy; either they are spinning more slowly than black holes in our own galaxy or they spin rapidly but are 'tumbled around' with spins randomly oriented to their orbit. […]

  • Hubble's twisted galaxy
    on August 22, 2017 at 6:50 pm

    Gravity governs the movements of the cosmos. It draws flocks of galaxies together to form small groups and more massive galaxy clusters, and brings duos so close that they begin to tug at one another. This latter scenario can have extreme consequences, with members of interacting pairs of galaxies often being dramatically distorted, torn apart, or driven to smash into one another, abandoning their former identities and merging to form a single accumulation of gas, dust and stars. […]

  • Trace of galaxies at the heart of a gigantic galaxy cluster
    on August 21, 2017 at 4:30 pm

    The discovery of numerous ultra-diffuse galaxies is both remarkable and puzzling, explain scientists in a new report. […]

  • Astrophysicist predicts detached, eclipsing white dwarfs to merge into exotic star
    on August 18, 2017 at 8:24 pm

    Astrophysicists have discovered two detached, eclipsing double white dwarf binaries with orbital periods of 40 and 46 minutes, respectively. White dwarfs are the remnants of Sun-like stars, many of which are found in pairs, or binaries. […]

  • An unusual white dwarf may be a supernova leftover
    on August 17, 2017 at 6:17 pm

    Astronomers have identified a white dwarf star in our galaxy that may be the leftover remains of a recently discovered type of supernova. […]

  • Supermassive black holes feed on cosmic jellyfish
    on August 16, 2017 at 5:46 pm

    Observations of 'Jellyfish galaxies' with ESO's Very Large Telescope have revealed a previously unknown way to fuel supermassive black holes. It seems the mechanism that produces the tentacles of gas and newborn stars that give these galaxies their nickname also makes it possible for the gas to reach the central regions of the galaxies, feeding the black hole that lurks in each of them and causing it to shine brilliantly. […]

  • Cosmic magnifying lens reveals inner jets of black holes
    on August 15, 2017 at 5:38 pm

    Jet material ejected from a black hole is magnified in new observations from Caltech's Owens Valley Radio Observatory. This discovery provides the best view yet of blobs of hot gas that shoot out from supermassive black holes. […]

  • 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. […]

  • Galactic winds push researchers to probe galaxies at unprecedented scale
    on August 10, 2017 at 9:33 pm

    After using the Titan supercomputer at Oak Ridge National Laboratory to rule out a potential mechanism for galactic wind, astrophysicists are aiming to generate nearly a trillion-cell simulation of an entire galaxy, which would be the largest simulation of a galaxy ever. […]

  • Why massive galaxies don't dance in crowds
    on August 10, 2017 at 2:49 pm

    Scientists have discovered why heavyweight galaxies living in a dense crowd of galaxies tend to spin more slowly than their lighter neighbors. Contrary to earlier thinking, the spin rate of the galaxy is determined by its mass, rather than how crowded its neighborhood is. […]