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E.g., 06/24/2018
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  • general relativity
  • an illustration of a Dyson sphere
  • lightning at Jupiter's pole
Your search has returned 1428 articles:
  • News in Brief

    Einstein’s general relativity reigns supreme, even on a galactic scale

    Chalk up another win for Einstein’s seemingly invincible theory of gravity. A new study shows that the theory of general relativity holds true even over vast distances.

    General relativity prevailed within a region spanning a galactic distance of about 6,500 light-years, scientists report in the June 22 Science. Previously, researchers have precisely tested the theory by studying its...

    06/21/2018 - 14:00 Physics, Astronomy
  • News

    To combat an expanding universe, aliens could hoard stars

    Survivalists prep for disaster by stocking up on emergency food rations. Aliens, on the other hand, might hoard stars.

    To offset a future cosmic energy shortage caused by the accelerating expansion of the universe, a super-advanced civilization could pluck stars from other galaxies and bring them home, theoretical astrophysicist Dan Hooper proposes June 13 at arXiv.org.

    It’s a far-...

    06/19/2018 - 14:50 Physics, Astronomy
  • Mystery Solved

    On Jupiter, lightning flashes from storms swirling at the poles

    When Voyager 1 revealed lightning on Jupiter in 1979, something about the flashes didn’t make sense. From a distance, it seemed like the radio waves from the massive planet’s lightning bolts didn’t reach the high frequency emitted by lightning on Earth. 

    But the Juno spacecraft, which has been orbiting much closer to Jupiter’s surface for the last two years, has helped solve the mystery...

    06/19/2018 - 12:00 Astronomy, Cosmology, Planetary Science
  • News

    Magnetic fields may be propping up the Pillars of Creation

    The Pillars of Creation may keep standing tall due to the magnetic field within the star-forming region.

    For the first time, scientists have made a detailed map of the magnetic field inside the pillars, made famous by an iconic 1995 Hubble Space Telescope image (SN Online: 1/6/15). The data reveal that the field runs along the length of each pillar, perpendicular to the magnetic field...

    06/15/2018 - 13:21 Astronomy
  • In 1968, scientists thought they were close to detecting gravity waves

    Gravity waves evidence

    The long search for gravitational waves … may be in the final lap…. Rotating binary stars or, perhaps, other galaxies like the Milky Way but far beyond it, or the center of the Milky Way itself, are likely sources for gravitational radiation. — Science News, June 22, 1968.

    Update

    Although Joseph Weber, a physicist at the University of Maryland, announced...

    06/15/2018 - 12:00 Astronomy, Physics
  • News in Brief

    Swirling gases reveal baby planets in a young star’s disk

    Baby planets growing in a disk of gas and dust around an infant star have been identified and weighed for the first time. In papers published June 13 in the Astrophysical Journal Letters, two teams of astronomers describe a new technique to observe the newborn planets with unprecedented precision.

    One team, led by Richard Teague of the University of Michigan in Ann Arbor, found two...

    06/14/2018 - 11:00 Exoplanets, Astronomy
  • Letters to the Editor

    Readers were curious about pendulum saws, laser tweezers and more

    Cutting remark

    Archaeologist Nicholas Blackwell built a version of a Bronze Age pendulum saw that may have been used to build Mycenaean palaces, Bruce Bower reported in “How a backyard pendulum saw sliced into a Bronze Age mystery” (SN: 4/28/18 & 5/12/18, p. 32).

    Reader Fredric Blum argued that a pendulum saw’s blade would have dulled too fast to completely cut through stone...

    06/12/2018 - 07:00 Astronomy, Archaeology, Technology
  • News

    The sun shrinks a teensy bit when it’s feeling active

    How big is the sun? Well, that depends on when you’re measuring.

    The sun slightly shrinks and expands as it goes through a solar cycle, a roughly 11-year period of high and low magnetic activity, a new study finds. When the sun is the most active, its radius decreases by 1 or 2 kilometers, two researchers report in a paper accepted in the Astrophysical Journal. Given that the sun’s full...

    06/11/2018 - 07:00 Astronomy, Physics
  • News

    If real, dark fusion could help demystify this physics puzzle

    Fusion may have a dark side. A shadowy hypothetical process called “dark fusion” could be occurring throughout the cosmos, a new study suggests.

    The standard type of fusion occurs when two atomic nuclei unite to form a new element, releasing energy in the process. “This is why the sun shines,” says physicist Sam McDermott of Fermilab in Batavia, Ill. A similar process — dark fusion —...

    06/06/2018 - 09:00 Particle Physics, Astronomy
  • Science Ticker

    Take a virtual trip to an alien world

    If you’re looking for starry skies, exotic plant life and extreme weather on your summer vacation, NASA’s Exoplanet Travel Bureau has just the spot. Consider a trip to Kepler 186f.

    This extrasolar planet is nearly 558 light-years away, so a real trip may be out of your budget — and astronomers aren’t sure if the sphere even has a life-sustaining atmosphere. But NASA’s Exoplanet...

    06/04/2018 - 10:00 Exoplanets, Astronomy