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Keyword: ultraviolet

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  • Lost in Space: Half of All Stars Are Rogues Between Galaxies

    11/07/2014 1:26:34 PM PST · by BenLurkin · 13 replies
    space.com ^ | Charles Q. Choi
    A star mystery solved? These newfound stars could help solve the so-called "photon underproduction crisis," which suggests that an extraordinary amount of ultraviolet light appears to be missing from the universe. The intergalactic stars could also help address what is known as the "missing baryon problem." Baryons are a class of subatomic particles that includes the protons and neutrons that make up the hearts of atoms inside normal matter. Theories of the formation and evolution of the universe predict there should be far more baryons than scientists currently see. The baryons that astronomers have accounted for in the local cosmic...
  • Mayor launching crusade against tanning salons

    10/12/2013 7:44:09 PM PDT · by Tolerance Sucks Rocks · 15 replies
    The New York Post ^ | October 11, 2013 | Carl Campanile
    <p>The city is launching a new offensive to monitor tanning salons and warn customers of the dangers of skin cancer from overexposure to UV radiation, The Post has learned.</p> <p>In what could be the Bloomberg’s Administration’s final health crusade, the anti-tanorexic plan will be submitted to the Board of Health on Tuesday,. The board — all appointees of Mayor Bloomberg — is expected to adopt the new rules, which would take effect in the spring following public hearings.</p>
  • Ultraviolet light reveals how ancient Greek statues really looked [Amazing Tech!]

    08/20/2010 12:31:24 PM PDT · by James C. Bennett · 97 replies
    Gizmodo ^ | 20 August, 2010 | Gizmodo
       Original Greek statues were brightly painted, but after thousands of years, those paints have worn away. Find out how shining a light on the statues can be that's required to see them the way they were thousands of years ago.Although it seems impossible to think that anything could be left to discover after thousands of years of wind, sun, sand, and art students, finding the long lost patterns on a piece of ancient Greek sculpture can be as easy as shining a lamp on it. A technique called ‘raking light' has been used to analyze art for a long...
  • Ottawa boy's invisible invention warns birds about deadly windows

    01/23/2009 11:47:02 AM PST · by Abathar · 44 replies · 331+ views
    CBC news ^ | January 21, 2009
    Eighth grader Charlie Sobcov wants to stop birds from dying in collisions with windows, but he doesn't want to ruin anybody's view. For his latest school science fair project he has invented painted, plastic decals that can be placed — discreetly — right in the middle of a window pane. "This paint is a colour that birds can see but humans can't," he said Wednesday on CBC Radio's All in a Day. "It's like putting a big stop sign in the middle of the window." The colour is ultraviolet, beyond the range of colours visible to humans. That means the...
  • Sun Damage Sun kills 60,000 a year, WHO says

    08/01/2006 8:51:39 AM PDT · by SheLion · 59 replies · 1,229+ views
    As many as 60,000 people a year die from too much sun, mostly from malignant skin cancer, the World Health Organization reported...As many as 60,000 people a year die from too much sun, mostly from malignant skin cancer, the World Health Organization reported on Wednesday. It found that 48,000 deaths every year are caused by malignant melanomas, and 12,000 by other kinds of skin cancer. About 90 percent of such cancers are caused by ultraviolet light from the sun. Radiation from the sun also causes often serious sunburn, skin aging, eye cataracts, pterygium -- a fleshy growth on the surface...
  • A bathroom that cleans itself

    02/08/2006 10:12:06 AM PST · by LibWhacker · 37 replies · 1,048+ views
    Cleaning bathrooms may become a thing of the past with new coatings that will do the job for you. Researchers at the University of New South Wales are developing new coatings they hope will be used for self-cleaning surfaces in hospitals and the home. Led by Professor Rose Amal and Professor Michael Brungs of the ARC Centre for Functional Nanomaterials, a research team is studying tiny particles of titanium dioxide currently used on outdoor surfaces such as self-cleaning windows. The particles work by absorbing ultraviolet light below a certain wavelength, exciting electrons and giving the particles an oxidising quality stronger...
  • Dark, Leafy Greens Help Shield Eyes from Cataracts

    12/03/2004 10:10:23 PM PST · by NormsRevenge · 32 replies · 696+ views
    Reuters on Yahoo ^ | 12/3/04 | Alison McCook - Reuters Health
    NEW YORK (Reuters Health) - New research provides further evidence that substances in kale, spinach and other green vegetables help protect aging eyes from cataracts. In an experiment, investigators found that human eye cells treated with antioxidants called lutein and zeaxanthin showed less damage after being exposed to ultraviolet rays, the sunlight ingredient considered a major contributor to cataracts. Cataracts occur when proteins in the eye's lens begin to clump together, forming a milky cloud that obscures vision. Currently, around 20 million Americans have cataracts, and research suggests that the more sunlight you are exposed to in life, the greater...
  • US lab sent N-secrets over e-mail (pulsed ultraviolet laser(

    07/19/2004 4:11:33 PM PDT · by take · 9 replies · 1,030+ views
    http://us.rediff.com/news/2004/jul/19lab.htm ^ | July 19, 2004 | /us.rediff.com
    US lab sent N-secrets over e-mail Los Alamos National Laboratory officials have discovered in recent weeks that secret information at the nuclear weapons facility was repeatedly transmitted over an unclassified e-mail system, reports the Los Angeles Times. Officials at the New Mexico lab confirmed Sunday that the incidents were reported to Energy Department headquarters in Washington, and said that they were taking measures to improve security and "prevent significant risks to national security", the paper said. Last week, the lab's director disclosed that two disks containing classified nuclear weapons information were lost. The disks contained information about a possible test...
  • 2003 Antarctic Ozone Hole Equals Record Size

    09/17/2003 10:31:26 AM PDT · by cogitator · 81 replies · 811+ views
    Space Daily ^ | 09/17/2003
    Antarctic Ozone Hole Roars BackMeasurements over and near Antarctica show that ozone is decreasing more rapidly this year than in previous years and that the size of the ozone hole is now as large as the all time record size of 28 million sq. km during September 2000. This is in stark contrast to the ozone hole last year when it was the smallest in more than a decade after splitting in two during late September. In recent years, the ozone hole is at or near its maximum size during mid-September, with the maximum sometimes reached in late September....
  • Astronomy Picture of the Day 3-19-03

    03/19/2003 5:14:08 AM PST · by petuniasevan · 5 replies · 349+ views
    NASA ^ | 3-19-03 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 March 19 Jupiter's Great Dark Spot Credit: Cassini Imaging Team, Cassini Project, NASA Explanation: Seventeenth century astronomer Giovanni Domenico Cassini was an astute observer of Jupiter's Great Red Spot. So it seems only fitting that his namesake, the Cassini spacecraft, has enabled detailed observations of another planet-sized blemish -- Jupiter's Great Dark Spot. Unlike the Red Spot, the Great Dark Spot lies near Jupiter's north pole and...
  • Astronomy Picture of the Day 3-18-03

    03/18/2003 5:12:17 AM PST · by petuniasevan · 10 replies · 481+ views
    NASA ^ | 3-18-03 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2003 March 18 Coronal Holes on the Sun Credit: SOHO - EIT Consortium, ESA, NASA Explanation: The ominous, dark shapes haunting the left side of the Sun are coronal holes -- low density regions extending above the surface where the solar magnetic field opens freely into interplanetary space. Studied extensively from space since the 1960s in ultraviolet and x-ray light, coronal holes are known to be the source...
  • Astronomy Picture of the Day 5-16-02

    05/16/2002 12:57:42 AM PDT · by petuniasevan · 8 replies · 422+ views
    NASA ^ | 5-16-02 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 May 16 Double Trouble Solar Bubbles Credit: SOHO Consortium, LASCO, EIT ESA, NASA Explanation: During April and May, attention has been focused on the western evening sky, presenting its spectacle of bright planets and crescent moons shortly after sunset. Meanwhile, the Sun itself has not been just sinking quietly below the horizon. For example on May 2nd, two enormous clouds of energetic particles blasted away from the...
  • Astronomy Picture of the Day 5-08-02

    05/08/2002 5:09:37 AM PDT · by petuniasevan · 23 replies · 338+ views
    NASA ^ | 5-08-02 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 May 8 Sunspot Loops in Ultraviolet Credit: TRACE Project, NASA Explanation: It was a quiet day on the Sun. The above image shows, however, that even during off days the Sun's surface is a busy place. Shown in ultraviolet light, the relatively cool dark regions have temperatures of thousands of degrees Celsius. Large sunspot group AR 9169 is visible as the bright area near the horizon. The...
  • Astronomy Picture of the Day 4-28-02

    04/28/2002 12:43:06 AM PDT · by petuniasevan · 9 replies · 268+ views
    NASA ^ | 4-28-02 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 April 28 Doomed Star Eta Carinae Credit: J. Morse (U. Colorado), K. Davidson (U. Minnesota) et al., WFPC2, HST, NASA Explanation: Eta Carinae may be about to explode. But no one knows when - it may be next year, it may be one million years from now. Eta Carinae's mass - about 100 times greater than our Sun - makes it an excellent candidate for a full...
  • Astronomy Picture of the Day 3-21-02

    03/21/2002 1:02:01 PM PST · by petuniasevan · 14 replies · 419+ views
    NASA ^ | 3-21-02 | Robert Nemiroff and Jerry Bonnell
    Astronomy Picture of the Day Discover the cosmos! Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2002 March 21 S is for Sun Credit: SOHO - EIT Consortium, ESA, NASA Explanation: Taken yesterday from the SOHO spacecraft, this false-color image shows the active Sun near the March Equinox, the beginning of Fall in the south and Spring in the northern hemisphere. Recorded in a band of extreme ultraviolet light emitted by highly ionized iron atoms, the Sun's upper atmosphere or solar corona shines with...