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  • KAGRA experiment
  • periodic table
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Your search has returned 941 articles:
  • News

    A new gravitational wave detector is almost ready to join the search

    In the quest for better gravitational wave detectors, scientists are going cold.

    An up-and-coming detector called KAGRA aims to spot spacetime ripples by harnessing advanced technological twists: chilling key components to temperatures hovering just above absolute zero, and placing the ultrasensitive setup in an enormous underground cavern.

    Scientists with KAGRA, located in Kamioka...

    01/18/2019 - 07:00 Physics, Astronomy
  • Feature

    150 years on, the periodic table has more stories than it has elements

    Recognize these rows and columns? You may remember a detail or two about this mighty table’s organization from a long-ago chemistry class. Elements are ordered according to their number of protons, or atomic number. Metals are mostly to the left and nonmetals to the right. The column at the far right holds the noble gases, named for their general unwillingness to interact with other elements...

    01/08/2019 - 11:29 Chemistry, Physics
  • News in Brief

    A weird type of zirconium soaks up neutrons like a sponge

    When radiochemist Jennifer Shusterman and her colleagues got the first results of their experiment, no one expected what they saw: Atoms of a weird version of the element zirconium had enthusiastically absorbed neutrons.

    “People were quite surprised and we had lots of discussions,” says Shusterman, of Hunter College of the City University of New York.

    The source of this fuss was...

    01/07/2019 - 11:00 Physics
  • News in Brief

    High-speed video reveals physics tricks for shooting a rubber band

    Scientists are taking aim at the physics of rubber band bombardments.

    Using high-speed video, researchers have analyzed what happens to a rubber band when it’s launched from a thumb. The results offer some tips for how to make a clean shot, Boston University mechanical engineers Alexandros Oratis and James Bird report in a paper in press in Physical Review Letters.

    The researchers...

    01/04/2019 - 09:00 Physics
  • News in Brief

    The physics of fluids explains how crowds of marathon runners move

    Marathoners queuing up for a big race tend to go with the flow, surging toward the start line like a fluid.

    Using footage of runners moving in groups toward the start of the Chicago Marathon, researchers developed a theory that treats the crowd like a liquid to explain its movement. The theory correctly predicted the motion of crowds of runners at marathons in two other locations,...

    01/03/2019 - 14:00 Physics
  • News

    These sound waves can levitate and move particles in new ways

    A new machine uses ultrasonic waves to make particles dance in midair like marionettes on (invisible) strings.

    Unlike other devices that also use sound radiation to manipulate matter, the new system can move several objects in different directions at once (SN: 4/19/14, p. 8). This kind of levitation technology, described online the week of December 17 in Proceedings of the National...

    12/17/2018 - 15:00 Physics, Technology
  • News in Brief

    A satellite screw-up reaffirms Einstein’s theory of gravity

    An orbital oopsie has led to new proof of Albert Einstein’s physics prowess.

    In 2014, two satellites intended for Europe’s Galileo network, the equivalent of the United States’ GPS network, were placed into orbit incorrectly, causing them to travel around Earth in ellipses rather than circles. That wasn’t ideal for the satellites’ originally intended navigational use, but scientists...

    12/10/2018 - 06:00 Physics
  • Letters to the Editor

    Readers inquire about a Neptune-sized moon, nuclear pasta and more

    Exomoonmoon

    A sighting by the Hubble Space Telescope provides more evidence that there’s a Neptune-sized moon, dubbed Neptmoon, orbiting the exoplanet Kepler 1625b, Lisa Grossman reported in “Hubble may have spotted the first known exomoon” (SN: 10/27/18, p. 14).

    “If Neptmoon actually exists, could it possibly have moons of its own?” online reader MAdScientist72 asked. “And what...

    12/05/2018 - 05:00 Physics, Astronomy, Animals
  • News

    Scientists’ collection of gravitational waves just got a lot bigger

    Astronomers have now tallied up more gravitational wave sightings than they can count on their fingers.  

    Scientists with the LIGO and Virgo gravitational wave observatories report four new sets of these ripples in spacetime. Those additions bring the total count to 11, the researchers say in a study published December 3 at arXiv.org, marking major progress since the first gravitational...

    12/04/2018 - 13:19 Physics, Astronomy
  • News

    A new airplane uses charged molecules, not propellers or turbines, to fly

    A newly designed airplane prototype does away with noisy propellers and turbines.

    Instead, it’s powered by ionic wind: charged molecules, or ions, flowing in one direction and pushing the plane in the other. That setup makes the aircraft nearly silent. Such stealth planes could be useful for monitoring environmental conditions or capturing aerial imagery without disturbing natural...

    11/21/2018 - 13:00 Technology, Physics