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E.g., 09/23/2017
E.g., 09/23/2017
Your search has returned 234 images:
  • molecules
  • Sun halos
  • illustration of colliding neutron stars
Your search has returned 837 articles:
  • News

    Molecules face the big chill

    Molecules are seriously chilling out. Scientists report the first cooling of molecules below a previously impassable milestone. The result, in which scientists cooled molecules down to tens of millionths of a degree, is a step toward reaching the ultracold temperatures already achievable with atoms, researchers report August 28 in Nature Physics.

    Scientists regularly chill atoms to less...

    08/28/2017 - 12:41 Physics
  • How Bizarre

    Scientists create the most cubic form of ice crystals yet

    Cube-shaped ice is rare, at least at the microscopic level of the ice crystal. Now researchers have coaxed typically hexagonal 3-D ice crystals to form the most cubic ice ever created in the lab.

    Cubed ice crystals — which may exist naturally in cold, high-altitude clouds — could help improve scientists’ understanding of clouds and how they interact with Earth’s atmosphere and sunlight,...

    08/28/2017 - 07:00 Physics
  • News

    Rumors swirl that LIGO snagged gravitational waves from a neutron star collision

    View the video

    Speculation is running rampant about potential new discoveries of gravitational waves, just as the latest search wound down August 25.

    Publicly available logs from astronomical observatories indicate that several telescopes have been zeroing in on one particular region of the sky, potentially in response to a detection of ripples in spacetime by the Advanced Laser...

    08/25/2017 - 15:14 Astronomy, Physics
  • Letters to the Editor

    Inquiries about the moon's twilight zone, and more reader feedback

    Locked up

    Simulations suggest that heat from an infant Earth, the sun and the moon could have vaporized the moon’s metals into a thick atmosphere, Lisa Grossman reported in “Metallic air may have swaddled moon” (SN: 8/5/17, p. 7). One way to test the idea would be to look for a ring of extra sodium in rocks around the moon’s twilight zone, where sodium snow would have accumulated. This zone...

    08/23/2017 - 16:00 Astronomy, Microbiology, Physics
  • News

    Eclipse watchers will go after the biggest solar mystery: Why is the corona so hot?

    A total solar eclipse shines a light on the sun's elusive atmosphere. When the moon blocks the sun, it’s finally possible to see how this diffuse cloud of plasma, called the corona, is magnetically sculpted into beautiful loops. The material there is about a trillionth the density of the solar surface. From its delicate and diaphanous appearance, you might expect the corona to be where the sun...

    08/20/2017 - 06:00 Astronomy, Science & Society, Physics
  • News

    Does the corona look different when solar activity is high versus when it’s low?

    Some cities have all the luck.

    Carbondale, Ill., is just a few kilometers north of the point where this year’s total solar eclipse will linger longest — the city will get two minutes and 38 seconds of total darkness when the moon blocks out the sun. And it’s the only city in the United States that will also be in the path of totality when the next total solar eclipse crosses North...

    08/19/2017 - 07:00 Astronomy, Physics, Science & Society, Earth
  • News

    We share the Milky Way with 100 million black holes

    The Milky Way teems with black holes — about 100 million of them.

    But there’s no reason to fear. “It may sound like a big number, but by astronomical standards, it’s a pretty small number,” says physicist Daniel Holz of the University of Chicago. The number of stars in the Milky Way, for example, is about a thousand times larger.

    Scientists from the University of California, Irvine...

    08/18/2017 - 09:00 Astronomy, Physics
  • News

    Where does the solar wind come from? The eclipse may offer answers

    The sun can’t keep its hands to itself. A constant flow of charged particles streams away from the sun at hundreds of kilometers per second, battering vulnerable planets in its path.

    This barrage is called the solar wind, and it has had a direct role in shaping life in the solar system. It’s thought to have stripped away much of Mars’ atmosphere (SN: 4/29/17, p. 20). Earth is protected...

    08/18/2017 - 07:00 Astronomy, Science & Society, Physics
  • News

    Why are the loops in the sun’s atmosphere so neat and tidy?

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    When the Aug. 21 solar eclipse unveils the sun’s normally dim atmosphere, the corona will look like an intricate, orderly network of loops, fans and streamers. These features trace the corona’s magnetic field, which guides coronal plasma to take on the shape of tubes and sheets.

    These wispy coronal structures arise from the magnetic field on the sun’s visible surface...

    08/17/2017 - 07:00 Astronomy, Earth, Science & Society, Physics
  • News

    What can the eclipse tell us about the corona’s magnetic field?

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    The star of any solar eclipse is, of course, the sun. And total eclipses give the sun’s wispy, tenuous atmosphere the spotlight. This region, called the corona, is normally too dim to observe directly. But with the moon blocking the sun’s bright disk, the corona comes into view.

    And the view is dazzling. The corona’s hot plasma is a radiant, ever-changing tiara, full...

    08/16/2017 - 07:00 Astronomy, Earth, Science & Society, Physics