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Your search has returned 86 images:
  • Andromeda galaxy
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Your search has returned 118 articles:
  • Context

    Einstein’s latest anniversary marks the birth of modern cosmology

    First of two parts

    Sometimes it seems like every year offers an occasion to celebrate some sort of Einstein anniversary.

    In 2015, everybody lauded the 100th anniversary of his general theory of relativity. Last year, scientists celebrated the centennial of his prediction of gravitational waves — by reporting the discovery of gravitational waves. And this year marks the centennial...

    04/11/2017 - 11:45 History of Science, Cosmology
  • News

    Distant galaxies lack dark matter, study suggests

    Very distant galaxies have surprisingly little dark matter, the invisible stuff thought to make up the bulk of matter in the universe, new observations suggest.

    Stars in the outer regions of some far-off galaxies move more slowly than stars closer to the center, indicating a lack of dark matter, astronomer Reinhard Genzel and colleagues report online March 15 in Nature. If confirmed, the...

    03/15/2017 - 14:00 Astronomy, Cosmology
  • News

    Astronomers detect oldest known stardust in distant galaxy

    Astronomers may have spotted some of the earliest stardust ever created in the cosmos.

    Astrophysicist Nicolas Laporte of University College London and colleagues detected the dust in a galaxy seen as it was when the universe was only 600 million years old. “We are probably seeing the first stardust of the universe,” Laporte says. The observations, published online March 8 in the...

    03/08/2017 - 06:00 Astronomy, Cosmology
  • News

    Faint, distant galaxies may have driven early universe makeover

    Two cosmic magnifying glasses are giving astronomers a glimpse of some extremely faint galaxies that existed as far back as 600 million years after the Big Bang (13.8 billion years ago). Such views suggest that tiny galaxies in the early universe played a crucial role in cosmic reionization — when ultraviolet radiation stripped electrons from hydrogen atoms in the cosmos.

    “That we...

    02/06/2017 - 07:00 Astronomy, Cosmology
  • News in Brief

    New data fuel debate on universe’s expansion rate

    A new estimate of how fast the universe is expanding supports one side of an ongoing debate, favoring a more rapid expansion.

    Observations of type 1a supernovas imply a faster expansion rate (known as the Hubble constant) than studies of the cosmic microwave background — light that originated early in cosmic history (SN: 8/6/2016, p. 10). Scientists with the H0LiCOW collaboration have...

    02/02/2017 - 16:38 Cosmology, Physics
  • News in Brief

    Spin may reveal black hole history

    WASHINGTON — Researchers have devised a test to see if pairs of black holes — famous for creating gravitational waves when they merge — themselves formed from multiple mergers of smaller black holes.

    The Advanced Laser Interferometer Gravitational-Wave Observatory, LIGO, has detected spacetime ripples from two sets of merging black holes (SN: 7/9/16, p. 8). Scientists typically assume...

    01/30/2017 - 17:23 Astronomy, Cosmology
  • Feature

    Star-starved galaxies fill the cosmos

    Not all galaxies sparkle with stars. Galaxies as wide as the Milky Way but bereft of starlight are scattered throughout our cosmic neighborhood. Unlike Andromeda and other well-known galaxies, these dark beasts have no grand spirals of stars and gas wrapped around a glowing core, nor are they radiant balls of densely packed stars. Instead, researchers find just a wisp of starlight from a...

    11/29/2016 - 11:00 Astronomy, Cosmology
  • Reviews & Previews

    ‘A Most Improbable Journey’ offers scientific take on human history

    A Most Improbable JourneyWalter AlvarezW.W. Norton & Co., $26.95

    Most people do not marvel much at sand. We may enjoy how it feels under our bare feet, or get annoyed when someone tracks it into the house. But few of us see those quartz grains the way geologist Walter Alvarez does — as the product of 4.5 billion years of improbable cosmic and geologic events that defined the course...

    10/30/2016 - 08:00 Earth, Cosmology, Science & Society
  • Film

    ‘Voyage of Time’ is Terrence Malick’s ode to life

    Watch the trailer

    Condensing billions and billions and billions of years into a 45-minute film is a tall order. But director Terrence Malick took on the challenge with Voyage of Time. The film, now playing in IMAX theaters, surveys the 13.8-billion-year history of the universe and even looks eons into the future when we — life on Earth, the planet and the entire solar system — are gone...

    10/07/2016 - 16:38 Cosmology, Evolution
  • News

    After Big Bang, shock waves rocked newborn universe

    View the video

    Shock waves may have jolted the infant cosmos. Clumpiness in the density of the early universe piled up into traveling waves of abrupt density spikes, or shocks, like those that create a sonic boom, scientists say.

    Although a subtle effect, the shock waves could help scientists explain how matter came to dominate antimatter in the universe. They also could reveal the...

    09/30/2016 - 07:00 Cosmology