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.

  • Dawn of a galactic collision
    on December 14, 2017 at 7:07 pm

    A riot of color and light dances through this peculiarly shaped galaxy, NGC 5256. Its smoke-like plumes are flung out in all directions and the bright core illuminates the chaotic regions of gas and dust swirling through the galaxy's center. Its odd structure is due to the fact that this is not one galaxy, but two -- in the process of a galactic collision. […]

  • Hubble's celestial snow globe
    on December 12, 2017 at 7:19 pm

    It's beginning to look a lot like the holiday season in this Hubble Space Telescope image of a blizzard of stars, which resembles a swirling snowstorm in a snow globe. The stars are residents of the globular star cluster Messier 79 (also known as M79 or NGC 1904), located 41,000 light-years from Earth, in the constellation Lepus. […]

  • Telescopes team up to study giant galaxy
    on December 12, 2017 at 2:10 pm

    Astronomers have used two Australian radio telescopes and several optical telescopes to study complex mechanisms that are fuelling jets of material blasting away from a black hole 55 million times more massive than the Sun. […]

  • Galaxy orbits in the local supercluster
    on December 8, 2017 at 2:55 pm

    Astronomers have produced the most detailed map ever of the orbits of galaxies in our extended local neighborhood, showing the past motions of almost 1,400 galaxies within 100 million light years of the Milky Way. The team reconstructed the galaxies' motions from 13 billion years in the past to the present day. […]

  • Galaxy growth in a massive halo in the first billion years of cosmic history
    on December 7, 2017 at 7:07 pm

    Observations of two galaxies made with the National Science Foundation-funded Atacama Large Millimeter/submillimeter Array (ALMA) radio telescope suggest that large galaxies formed faster than scientists had previously thought. […]

  • Heavy metal: How first supernovae altered early star formation
    on December 6, 2017 at 7:23 pm

    An international team of researchers ran multi-scale, multi-physics 2-D and 3-D simulations to illustrate how heavy metals expelled from exploding supernovae held the first stars in the universe regulate subsequent star formation and influence the appearance of galaxies in the process. […]

  • ALMA finds massive primordial galaxies swimming in vast ocean of dark matter
    on December 6, 2017 at 6:20 pm

    New observations push back the epoch of massive-galaxy formation even further by identifying two giant galaxies seen when the universe was only 780 million years old, or about 5 percent its current age. […]

  • MACHOs are dead, WIMPs are a no-show -- say hello to SIMPs
    on December 4, 2017 at 9:23 pm

    The nature of dark matter remains elusive, with numerous experimental searches for WIMPs coming up empty-handed and MACHOs all but abandoned. Theorists have proposed a different type of dark matter particle, a strongly interacting massive particle or SIMP, that differs from WIMPs in that they interact strongly with one another and hardly at all with normal matter. The dark matter structure of a galaxy pile-up could be evidence for SIMPs. […]

  • MUSE probes uncharted depths of Hubble Ultra Deep Field
    on November 29, 2017 at 2:02 pm

    Astronomers using the MUSE instrument on ESO's Very Large Telescope in Chile have conducted the deepest spectroscopic survey ever. They focused on the Hubble Ultra Deep Field, measuring distances and properties of 1600 very faint galaxies including 72 galaxies that have never been detected before. This wealth of new information is giving astronomers insight into star formation in the early Universe. […]

  • Why is massive star formation quenched in galaxy centers?
    on November 28, 2017 at 5:33 pm

    A new study proposes that one of the reasons that slows down the rate at which massive stars form in galaxies is the existence of relatively large magnetic fields. Research has revealed that this process occurs around the center of the galaxy NGC 1097. […]

  • Infant stars found surprisingly near galaxy's supermassive black hole
    on November 28, 2017 at 5:32 pm

    ALMA has revealed the telltale signs of eleven low-mass stars forming perilously close -- within three light-years -- to the Milky Way's supermassive black hole. […]

  • Galactic microquasar provides explanation for structure of faraway radio galaxies
    on November 27, 2017 at 6:15 pm

    New results will aid the study of the distribution of gravitational waves from distant sources. […]

  • First proper motions measured of stars in a small galaxy outside the Milky Way
    on November 27, 2017 at 5:47 pm

    By combining data from the Hubble Space Telescope and the Gaia mission, astronomers have been able to measure the proper motion of 15 stars in the Sculptor Galaxy, the first such measurement outside the Milky Way. Analysis shows an unexpected preference in the direction of movement, which suggests that the standard theoretical models used to describe the motion of stars and dark matter halos in other galaxies might be invalid. […]

  • Astronomers reveal nearby stars that are among the oldest in our galaxy
    on November 20, 2017 at 7:14 pm

    Astronomers have discovered some of the oldest stars in our Milky Way galaxy by determining their locations and velocities. […]

  • Listening for gravitational waves using pulsars
    on November 15, 2017 at 2:25 pm

    When galaxies collide, their central black holes tend to spiral toward each other, releasing gravitational waves in their cosmic dance. To explore this uncharted area of gravitational wave science, researchers look a natural experiment in the sky called a pulsar timing array. Pulsars are dense remnants of dead stars that regularly emit beams of radio waves, which is why some call them "cosmic lighthouses." […]

  • Duo of titanic galaxies captured in extreme starbursting merger
    on November 13, 2017 at 5:36 pm

    Astronomers have uncovered the never-before-seen close encounter between two astoundingly bright and spectacularly massive galaxies in the early universe. […]

  • Stellar explosions and cosmic 'recipe' for nearby universe
    on November 13, 2017 at 5:36 pm

    Thanks to an in-depth look into the composition of gas in the Perseus galaxy cluster, Japan's Hitomi mission has given scientists new insights into the stellar explosions that formed its chemical elements. […]

  • Anatomy of a cosmic snake reveals structure of distant galaxies
    on November 13, 2017 at 4:11 pm

    We have a fair understanding of star formation, from the interstellar matter to the diffuse clouds whose gravitational contraction gives birth to stars. But observations of distant galaxies have questioned this picture, the size and mass of these distant stellar nurseries exceeding that of their local counterparts. Astrophysicists have tackled this inconsistency and found the first answers thanks to the observation of the cosmic snake. […]

  • Expanding light echo spotted around supernova
    on November 9, 2017 at 7:10 pm

    Hubble images reveal an expanding shell of light from a supernova explosion sweeping through interstellar space three years after the stellar blast was discovered. The "echoing" light looks like a ripple expanding on a pond. The supernova, called SN 2014J, was discovered on Jan. 21, 2014. […]

  • Shocking results of galaxy-cluster collisions
    on November 7, 2017 at 5:28 pm

    Combining new images from the Very Large Array with X-Ray and visible-light images reveals the spectacular, energetic outcome when clusters of hundreds of galaxies each collide with each other. […]

  • Forest of molecular signals in star forming galaxy
    on November 6, 2017 at 2:00 pm

    Astronomers have found a rich molecular reservoir in the heart of an active star-forming galaxy with the Atacama Large Millimeter/submillimeter Array (ALMA). Among eight clouds identified at the center of the galaxy NGC 253, one exhibits very complex chemical composition, while in the other clouds many signals are missing. This chemical richness and diversity shed light on the nature of the baby boom galaxy. […]

  • Hubble sees nearby asteroids photobombing distant galaxies
    on November 2, 2017 at 5:17 pm

    Photobombing asteroids from our solar system have snuck their way into this deep image of the universe taken by NASA's Hubble Space Telescope. These asteroids reside roughly 160 million miles from Earth, yet they've horned their way into this picture of thousands of galaxies scattered across space and time at inconceivably farther distances. […]

  • Minor merger kicks supermassive black hole into high gear
    on October 31, 2017 at 2:18 pm

    Astronomers are studying the galaxy M77, which is famous for its super-active nucleus that releases enormous energy. The unprecedented deep image of the galaxy reveals evidence of a hidden minor merger billions of years ago. The discovery gives crucial evidence for the minor merger origin of active galactic nuclei. […]

  • Monster colliding black holes might lurk on the edge of spiral galaxies
    on October 30, 2017 at 7:44 pm

    The outskirts of spiral galaxies like our own could be crowded with colliding black holes of massive proportions and a prime location for scientists hunting the sources of gravitational waves, said researchers. Their study identifies an overlooked region potentially rife with orbiting black holes. Identifying host galaxies of merging massive black holes could help explain how orbiting pairs of black holes form. […]

  • Wobbling galaxies: New evidence for dark matter makes it even more exotic
    on October 26, 2017 at 2:31 pm

    Astronomers have discovered that the brightest galaxies within galaxy clusters 'wobble' relative to the cluster's center of mass. This unexpected result is inconsistent with predictions made by the current standard model of dark matter. With further analysis it may provide insights into the nature of dark matter, perhaps even indicating that new physics is at work. […]

  • Galactic secrets revealed
    on October 25, 2017 at 1:05 pm

    Countless galaxies vie for attention in this monster image of the Fornax Galaxy Cluster, some appearing only as pinpricks of light while others dominate the foreground. One of these is the lenticular galaxy NGC 1316. The turbulent past of this much-studied galaxy has left it with a delicate structure of loops, arcs and rings that astronomers have now imaged in greater detail than ever before with the VLT Survey Telescope. […]

  • 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. […]