News / Science & Technology

    NASA Unveils New Sun Images

    These two images show a section of the sun as seen by NASA's Interface Region Imaging Spectrograph, or IRIS, on the right and NASA's SDO on the left.
    These two images show a section of the sun as seen by NASA's Interface Region Imaging Spectrograph, or IRIS, on the right and NASA's SDO on the left.
    Suzanne Presto
    NASA's new solar observatory is already giving scientists an unprecedented glimpse of the sun.  The U.S. space agency has released the first images from the Interface Region Imaging Spectrograph, known as IRIS, which was launched one month ago.
     
    The images show an active, dynamic region.  NASA describes spots that quickly brighten and dim, and thread-like towers of energy that reveal major temperature differences in the sun's lower atmosphere. 
     
    The IRIS satellite looks at the little-understood, lowest layers of the sun's atmosphere. 
     
    Solving solar mysteries 
     
    Still image from the first IRIS movie, 21 hours after opening the door.Still image from the first IRIS movie, 21 hours after opening the door.
    x
    Still image from the first IRIS movie, 21 hours after opening the door.
    Still image from the first IRIS movie, 21 hours after opening the door.
    John Grunsfeld, of NASA's Science Mission Directorate in Washington, described the moment on July 17 when the solar observatory's telescope caught its first glimpse of the sun. 
     
    "When the aperture door opened, it was truly a grand opening of a new era of solar physics," he told reporters.  
     
    Grunsfeld described the sun's interface region as "a crucial link in that story of unraveling the mysteries of the sun."  
     
    Among those mysteries is just how the sun's upper atmosphere is so much hotter than its surface, even though it's farther from the sun's heat-generating core.  IRIS observes the way solar material gathers energy and heats up as it rises through the sun's lower atmosphere.
     
    Computer simulations vs. IRIS images
     
    Bart DePontieu, an IRIS researcher based at Lockheed Martin's Advanced Technology Center in California, says scientists have compared computer simulations and the data they've collected from IRIS.  
     
    "We've been struck by the similarities with what IRIS sees, but we also already know that there are differences that are puzzling us," he said.  "And, actually, that's where we get excited because it's these discrepancies that tell us that we're missing something in our understanding."  
     
    DePontieu says scientists hope to observe large explosions on the sun that can disrupt technology here on Earth, as well as the less dramatic solar moments that affect near-Earth space and our climate.
     
    The $181 million IRIS mission is set to last two years, but scientists say the solar explorer could function much longer.   
     

    You May Like

    Video Migrants Continue to Risk Lives Crossing US Border From Mexico

    In remote areas of the Sonoran Desert, which straddles the US-Mexico, thousands of migrants face arid desolation

    Video Recycling is Lifeline for Lebanon’s Last Glassblowers

    It's an ancient craft that stretches back millennia - but despite Lebanon’s trash crisis providing a lifeline, remaining glass blowers face an uncertain future

    Meet the Alleged Killer of Cambodia’s Kem Ley

    What little is known about former soldier, troublesome Buddhist monk and indebted gambler, raises more questions than answers

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    London’s Financial Crown at Risk as Rivals Eye Brexit Opportunitiesi
    X
    VOA News
    July 25, 2016 5:09 PM
    By most measures, London rivals New York as the only true global financial center. But Britain’s vote to leave the European Union – so-called ‘Brexit’ – means the city could lose its right to sell services tariff-free across the bloc, risking its position as Europe’s financial headquarters. Already some banks have said they may shift operations to the mainland. Henry Ridgwell reports from London.
    Video

    Video London’s Financial Crown at Risk as Rivals Eye Brexit Opportunities

    By most measures, London rivals New York as the only true global financial center. But Britain’s vote to leave the European Union – so-called ‘Brexit’ – means the city could lose its right to sell services tariff-free across the bloc, risking its position as Europe’s financial headquarters. Already some banks have said they may shift operations to the mainland. Henry Ridgwell reports from London.
    Video

    Video Recycling Lifeline for Lebanon’s Last Glassblowers

    In a small Lebanese coastal town, one family is preserving a craft that stretches back millennia. The art of glass blowing was developed by Phoenicians in the region, and the Khalifehs say they are the only ones keeping the skill alive in Lebanon. But despite teaming up with an eco-entrepreneur and receiving an unexpected boost from the country’s recent trash crisis the future remains uncertain. John Owens reports from Sarafand.
    Video

    Video Migrants Continue to Risk Lives Crossing US Border from Mexico

    In his speech Thursday before the Republican National Convention, the party’s presidential candidate, Donald Trump, reiterated his proposal to build a wall along the U.S.-Mexico border if elected. Polls show a large percentage of Americans support better control of the nation's southwestern border, but as VOA’s Greg Flakus reports from the border town of Nogales in the Mexican state of Sonora, the situation faced by people trying to cross the border is already daunting.
    Video

    Video In State of Emergency, Turkey’s Erdogan Focuses on Spiritual Movement

    The state of emergency that Turkish President Recep Tayyip Erdogan has declared is giving him even more power to expand a purge that has seen an estimated 60,000 people either arrested or suspended from their jobs. VOA Europe correspondent Luis Ramirez reports from Istanbul.
    Video

    Video Calm the Waters: US Doubles Down Diplomatic Efforts in ASEAN Meetings

    The United States is redoubling diplomatic efforts and looking to upcoming regional meetings to calm the waters after an international tribunal invalidated the legal basis of Beijing's extensive claims in the South China Sea. VOA State Department correspondent Nike Ching has the story.
    Video

    Video Four Brother Goats Arrive in Brooklyn on a Mission

    While it's unusual to see farm animals in cities, it's become familiar for residents of Brooklyn, New York, to see a little herd of goats. Unlike gas-powered mowing equipment, goats remove invasive weeds quietly and without adding more pollution to the air. As Faiza Elmasry tells us, this is a pilot program and if it proves to be successful, the goat gardener program will be extended to other areas of New York. Faith Lapidus narrates.
    Video

    Video Scientists in Poland Race to Save Honeybees

    Honeybees are in danger worldwide. Causes of what's known as colony collapse disorder range from pesticides and loss of habitat to infections. But scientists in Poland say they are on track to finding a cure for one of the diseases. VOA’s George Putic reports.
    Video

    Video Wall Already Runs Along Parts of US-Mexico Border

    The Republican Party’s presidential nominee, Donald Trump, gained the support of many voters by saying he would build a wall to keep undocumented immigrants and drugs from coming across the border from Mexico. Critics have called his idea impractical and offensive to Mexico, while supporters say such a bold approach is needed to control the border. VOA’s Greg Flakus has more from the border town of Nogales, Arizona.
    Video

    Video New HIV Tests Emphasize Rapid Results

    As the global fight against AIDS intensifies, activists have placed increasing importance on getting people to know their HIV status. Some companies are developing new HIV testing methods designed to be quick, easy and accurate. Thuso Khumalo looks at the latest methods, presented at the International AIDS conference in Durban, South Africa.
    Video

    Video African Youth with HIV Urge More Support

    HIV, the virus that causes AIDS, is the top killer of teens in sub-Saharan Africa. But many youths say their experience with the virus is unique and needs to be addressed differently than the adult epidemic. VOA South African Correspondent Anita Powell reports.
    Video

    Video Pop-Up Art Comes to Your Living Room, Backyard and Elsewhere

    Around the world, independent artists and musicians wrestle with a common problem: where to exhibit or perform? Traditional spaces such as museums and galleries are reserved for bigger names, and renting a space is not feasible for many. Enter ArtsUp, which connects artists with venue owners. Whether it’s a living room, restaurant, office or even a boat, pop-up events are bringing music and art to unexpected places. Tina Trinh has more.
    Video

    Video Scotland’s Booming Whisky Industry Fears Brexit Hangover

    After Britain’s vote to leave the European Union, Scotland’s government wants to break away from the United Kingdom – fearing the nation’s exports are at risk. Among the biggest of these is whisky. Henry Ridgwell reports on a time of turmoil for those involved in the ancient art of distilling Scotland’s most famous product.

    Special Report

    Adrift The Invisible African Diaspora