News / Science & Technology

    Largest Known Star in Universe Tearing Itself Apart

    This new picture from the VLT Survey Telescope (VST) at ESO's Paranal Observatory shows the remarkable super star cluster Westerlund 1 (eso1034). This exceptionally bright cluster lies about 16 000 light-years from Earth in the southern constellation of A
    This new picture from the VLT Survey Telescope (VST) at ESO's Paranal Observatory shows the remarkable super star cluster Westerlund 1 (eso1034). This exceptionally bright cluster lies about 16 000 light-years from Earth in the southern constellation of A

    Related Articles

    Journal: Life on Earth Will End in 1.75 to 3.25 Billion Years

    British researchers looked at planets outside our solar system to come up with estimate of how long Earth will be habitable

    'Super Earth' Exoplanet May Have Water Atmosphere

    Planet, detected by Japanese astronomers, is located 40 light years from Earth in constellation Ophiuchus

    Water Discovered in Extrasolar, Rocky World

    Scientists think system had potential to contain Earth-like exoplanets
    VOA News
    The largest star in the known Universe is dying and will soon explode, astronomers said.

    The star, named W26, is in the Westerlund 1 cluster of clouds, some 16,000 light years from Earth in the southern constellation of Ara. Westerlund 1 is the most massive cluster of stars in our galaxy, home to several hundred of thousand stars.

    W26 has a radius 1,500 larger than the Sun and is one of the most luminous red supergiants known. Such stars are believed to be highly evolved, which suggests its coming to the end of its life and will explode as a supernova.

    Some of the most massive stars have lifetimes of less than a few million years before they exhaust their nuclear fuel and explode. At the very ends of their lives, these stars become highly unstable and eject a considerable amount of material from their outer envelopes. This material has been enriched by nuclear reactions deep within the star and includes many of the elements necessary for forming rocky planets like our Earth, such as silicon and magnesium.  Those elements are also the basis for life. How this material is ejected and how it affects the evolution of the star is still a mystery.

    Astronomers from the UK, Chile, Germany and the U.S. spotted a cloud of glowing hydrogen gas, shown as green in this new image, using the Very Large Telescope Survey Telescope (VST) at the European Southern Observatory's Paranal Observatory in Chile.

    Such glowing clouds are ionized, meaning that the electrons have been stripped away from the atoms of hydrogen gas. Clouds of this type are rarely found around massive stars and are even rarer around red supergiant stars such as W26. This is the first ionized nebula ever discovered around such a star.

    The nebula observed around W26 is very similar to the nebula surrounding SN1987A, the remnant of a star that exploded as a supernova in 1987. SN1987A was the closest observed supernova to Earth since 1604 and as such, it gave astronomers a chance to better study the properties of these explosions. Studying objects like the new nebula around W26 will help astronomers to understand the mass loss processes around these massive stars, which eventually lead to their explosive demise.

    The researchers publish their results in the Oxford University Press journal Monthly Notices of the Royal Astronomical Society.

    You May Like

    US, Allies Discuss Next Steps in Islamic State Fight

    Meeting comes a day after US Navy SEAL was killed while fighting Islamic State forces in northern Iraq

    In China, Traditional Banks Fight Challenge From Internet Firms

    Internet companies lent more than $150 billion to customers in 2015, which is an extremely small amount compared to the much larger lending by commercial banks last year

    Trump Faces Tough Presidential Odds Against Clinton

    According to analysts, early indications are that Republican front-runner faces daunting contest against likely Democratic candidate, former secretary of state Hillary Clinton

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    Press Freedom in Myanmar Fragile, Limitedi
    X
    Katie Arnold
    May 04, 2016 12:31 PM
    As Myanmar begins a new era with a democratically elected government, many issues of the past confront the new leadership. Among them is press freedom in a country where journalists have been routinely harassed or jailed.
    Video

    Video Press Freedom in Myanmar Fragile, Limited

    As Myanmar begins a new era with a democratically elected government, many issues of the past confront the new leadership. Among them is press freedom in a country where journalists have been routinely harassed or jailed.
    Video

    Video Taliban Threats Force Messi Fan to Leave Afghanistan

    A young Afghan boy, who recently received autographed shirts and a football from his soccer hero Lionel Messi, has fled his country due to safety concerns. He and his family are now taking refuge in neighboring Pakistan. VOA's Ayaz Gul reports from Islamabad.
    Video

    Video Major Rubbish Burning Experiment Captures Destructive Greenhouse Gases

    The world’s first test to capture environmentally harmful carbon dioxide gases from the fumes of burning rubbish took place recently in Oslo, Norway. The successful experiment at the city's main incinerator plant, showcased a method for capturing most of the carbon dioxide. VOA’s Deborah Block has more.
    Video

    Video EU Visa Block Threatens To Derail EU-Turkey Migrant Deal

    Turkish citizens could soon benefit from visa-free travel to Europe as part of the recent deal between the EU and Ankara to stem the flow of refugees. In return, Turkey has pledged to keep the migrants on Turkish soil and crack down on those who are smuggling them. Brussels is set to publish its latest progress report Wednesday — but as Henry Ridgwell reports from London, many EU lawmakers are threatening to veto the deal over human rights concerns.
    Video

    Video Tensions Rising Ahead of South China Sea Ruling

    As the Philippines awaits an international arbitration ruling on a challenge to China's claims to nearly all of the South China Sea, it is already becoming clear that regardless of which way the decision goes, the dispute is intensifying. VOA’s Bill Ide has more from Beijing.
    Video

    Video Painting Captures President Lincoln Assassination Aftermath

    A newly restored painting captures the moments following President Abraham Lincoln’s assassination in 1865. It was recently unveiled at Ford’s Theatre in Washington, where America’s 16th president was shot. It is the only known painting by an eyewitness that captures the horror of that fateful night. VOA’s Julie Taboh tells us more about the painting and what it took to restore it to its original condition.
    Video

    Video Elephant Summit Results in $5M in Pledges, Presidential Support

    Attended and supported by three African presidents, a three-day anti-poaching summit has concluded in Kenya, resulting in $5 million in pledges and a united message to the world that elephants are worth more alive than dead. The summit culminated at the Nairobi National Park with the largest ivory burn in history. VOA’s Jill Craig attended the summit and has this report about the outcomes.
    Video

    Video Displaced By War, Syrian Artist Finds Inspiration Abroad

    Saudi-born Syrian painter Mohammad Zaza is among the millions who fled their home for an uncertain future after Syria's civil war broke out. Since fleeing Syria, Zaza has lived in Lebanon, Egypt, Jordan and now Turkey where his latest exhibition, “Earth is Blue like an Orange,” opened in Istanbul. He spoke with VOA about how being displaced by the Syrian civil war has affected the country's artists.
    Video

    Video Ethiopia’s Drought Takes Toll on Children

    Ethiopia is dealing with its worst drought in decades, thanks to El Nino weather patterns. An estimated 10 million people urgently need food aid. Six million of them are children, whose development may be compromised without sufficient help, Marthe van der Wolf reports for VOA from the Metahara district.
    Video

    Video Little Havana - a Slice of Cuban Culture in Florida

    Hispanic culture permeates everything in Miami’s Little Havana area: elderly men playing dominoes as they discuss politics, cigar rollers deep at work, or Cuban exiles talking with presidential candidates at a Cuban coffee window. With the recent rapprochement between Cuba and United States, one can only expect stronger ties between South Florida and Cuba.
    Video

    Video California Republicans Weigh Presidential Choices Amid Protests

    Republican presidential candidates have been wooing local party leaders in California, a state that could be decisive in selecting the party's nominee for U.S. president. VOA's Mike O’Sullivan reports delegates to the California party convention have been evaluating choices, while front-runner Donald Trump drew hundreds of raucous protesters Friday.
    Video

    Video ‘The Lights of Africa’ - Through the Eyes of 54 Artists

    An exhibition bringing together the work of 54 African artists, one from each country, is touring the continent after debuting at COP21 in Paris. Called "Lumières d'Afrique," the show centers on access to electricity and, more figuratively, ideas that enlighten. Emilie Iob reports from Abidjan, the exhibition's first stop.

    Special Report

    Adrift The Invisible African Diaspora