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.

  • 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. […]

  • Black holes pervade the universe, celestial census indicates
    on August 7, 2017 at 7:54 pm

    After conducting a cosmic inventory of sorts to calculate and categorize stellar-remnant black holes, astronomers have concluded that there are probably tens of millions of the enigmatic, dark objects in the Milky Way -- far more than expected. […]

  • 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. […]

  • 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. […]

  • Astronomers discover 'heavy metal' supernova rocking out
    on July 31, 2017 at 3:45 pm

    An extraordinarily bright supernova occurred in a surprising location, astronomers have found. This 'heavy metal' supernova discovery challenges current ideas of how and where such super-charged supernovas occur. In the past decade, astronomers have discovered about 50 supernovas, out of the thousands known, that are particularly powerful. Following the recent discovery of one of these, the researchers have uncovered vital clues about where some of these extraordinary objects come from. […]

  • 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). […]

  • Astrophysicists map out the light energy contained within the Milky Way
    on July 28, 2017 at 2:13 am

    For the first time, a team of scientists has calculated the distribution of all light energy contained within the Milky Way, which will provide new insight into the make-up of our galaxy and how stars in spiral galaxies such as ours form. […]

  • 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. […]

  • Galactic David and Goliath
    on July 27, 2017 at 2:30 pm

    The gravitational dance between two galaxies in our local neighbourhood has led to intriguing visual features in both as witnessed in this new NASA/ESA Hubble Space Telescope image. The tiny NGC 1510 and its colossal neighbour NGC 1512 are at the beginning of a lengthy merger, a crucial process in galaxy evolution. Despite its diminutive size, NGC 1510 has had a significant effect on NGC 1512's structure and amount of star formation. […]

  • 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. […]

  • 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. […]

  • Spiral arms allow school children to weigh black holes
    on July 20, 2017 at 3:36 pm

    Astronomers have provided a way for armchair astronomers, and even primary school children, to merely look at a spiral galaxy and estimate the mass of its hidden, central black hole. […]

  • High-energy trap in our galaxy's center, revealed by gamma-ray telescopes
    on July 18, 2017 at 6:29 pm

    The center of our Milky Way contains a 'trap' that concentrates some of the highest-energy cosmic rays, among the fastest particles in the galaxy, a combined analysis of data from NASA's Fermi Gamma-ray Space Telescope and the High Energy Stereoscopic System, a ground-based observatory in Namibia, suggests. […]

  • Hubble spots a barred Lynx spiral
    on July 14, 2017 at 10:31 pm

    Discovered by British astronomer William Herschel over 200 years ago, NGC 2500 lies about 30 million light-years away in the northern constellation of Lynx. NGC 2500 is a particular kind of spiral galaxy known as a barred spiral, its wispy arms swirling out from a bright, elongated core.&nbs […]

  • One of the brightest galaxies ever discovered
    on July 14, 2017 at 6:03 pm

    Thanks to an amplified image produced by a gravitational lens, and the Gran Telescopio CANARIAS, a team of scientists has discovered one of the brightest galaxies known from the epoch when the universe had 20 percent of its present age. […]

  • Complex gas motion in the centre of the Milky Way
    on July 13, 2017 at 8:54 pm

    Our solar system is located in the outer regions of the Milky Way, a disk-shaped galaxy with an approximate diameter of 100,000 light years. From Earth, its appearance can only be observed indirectly, by measuring positions and movements of stars and gas clouds. In addition to luminous stars, a substantial portion of the visible matter in our Milky Way is interstellar gas. Gas clouds in the so-called central molecular zone (CMZ) -- the innermost 1,500 light years of the Milky Way -- move on an elliptical central disk that has two spiral arms. A comprehensive model has now been used to simulate this motion. […]

  • 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. […]

  • Unusual galaxy in distant universe
    on July 12, 2017 at 11:46 am

    MACS2129-1 is dead in the sense that it no longer produces stars. But what makes this galaxy particularly significant is the fact that, unlike many dead galaxies, which tend to be elliptical or oval-shaped, this galaxy is disk or spiral-shaped, like the Milky Way, and its stars rotate in a flattened disk, much like the Milky Way's stars. […]

  • Hubble's hidden galaxy
    on July 7, 2017 at 5:38 pm

    Although IC 342 is bright, the galaxy sits near the equator of the Milky Way's disk, thick with glowing cosmic gas, bright stars, and dust, report investigators. […]

  • 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. […]

  • Milky Way could have 100 billion brown dwarfs
    on July 6, 2017 at 1:19 am

    Our galaxy could have 100 billion brown dwarfs or more according to a recent survey of dense star clusters, where brown dwarfs are abundant. […]

  • Fastest stars in the Milky Way are 'runaways' from another tiny galaxy
    on July 5, 2017 at 5:29 pm

    A group of astronomers have shown that the fastest-moving stars in our galaxy -- which are traveling so fast that they can escape the Milky Way -- are in fact runaways from a much smaller galaxy in orbit around our own. […]

  • 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. […]