News / Science & Technology

    Australian Scientists Track Space Junk by Listening to FM Radio

    FM radio waves bouncing of a piece of space debris.  (ARC Center of Excellence for All-sky Astrophysics)
    FM radio waves bouncing of a piece of space debris. (ARC Center of Excellence for All-sky Astrophysics)
    Rick Pantaleo
    Scientists in Australia are planning on listening to local FM radio stations with a very sensitive radio telescope

    No, they’re really not interested in hearing the latest song by Katy Perry or that controversial talk show that’s got people talking. 

    The researchers will be listening to the reflected radio waves that bounce off the tons of space junk that circles our planet in the hopes of helping to prevent possible catastrophic, multi-billion-dollar collisions in space.

    So far, the researchers have been able to track FM radio waves that bounced off the International Space Station, some 400 or so kilometers from the Earth’s surface, as it passed over Western Australia. 

    Image of Earth surrounded by orbiting objects that are currently being tracked. Approximately 95% of these objects are space debris. (NASA)Image of Earth surrounded by orbiting objects that are currently being tracked. Approximately 95% of these objects are space debris. (NASA)
    x
    Image of Earth surrounded by orbiting objects that are currently being tracked. Approximately 95% of these objects are space debris. (NASA)
    Image of Earth surrounded by orbiting objects that are currently being tracked. Approximately 95% of these objects are space debris. (NASA)
    "We have shown that we are able to detect approximately 10 pieces of space junk simultaneously. Over time this means we are in a position to monitor a significant fraction of the space junk that is in Earth orbits," said the research team leader Professor Steven Tingay, of the Murchison Widefield Array (MWA) at Curtin University and the Australian Research Council Center for All-sky Astrophysics (CAASTRO).

    The idea of using reflected FM radio signals with the MWA to track space debris came from a previous study conducted by a graduate student from the Australian National University. Ben McKinley imaged the moon in 2012 by using reflected FM signals that bounced off of our orbiting satellite.

    NASA says that there are over 500,000 pieces of space junk orbiting Earth.  That junkyard of space debris circling Earth has been growing since the 1950s when the ‘Space Age’ first began. 

    Space junk can range in size from very large items such as old rocket bodies and dead satellites to very tiny particles that can even include bits of paint that were on the surfaces of various spacecraft. There’s even a screwdriver which slipped from an astronaut's hand during a spacewalk to do some repair work.

    Some of that space debris, especially those that are in low-Earth orbit, fall back to the planet, and much of it burns up during re-entry.

    But the dangers of collisions with space junk are quite real with hundreds of the satellites we’ve come to depend on in serious jeopardy.  Even a two-millimeter fleck of paint zooming at speeds of between seven to eight kilometers per second, can seriously harm or possibly kill space travelers or destroy a billion-dollar communications satellite.

    Aerial view of the Murchison Widefield Array (MWA) radio telescope in Western Australia's outback (Murchison Widefield Array)Aerial view of the Murchison Widefield Array (MWA) radio telescope in Western Australia's outback (Murchison Widefield Array)
    x
    Aerial view of the Murchison Widefield Array (MWA) radio telescope in Western Australia's outback (Murchison Widefield Array)
    Aerial view of the Murchison Widefield Array (MWA) radio telescope in Western Australia's outback (Murchison Widefield Array)
    While major collisions between large pieces of space debris are rare such incidents have happened. Back in Feb. 10, 2009, two large satellites, the Iridium 33 and the Kosmos 2251, collided at a speed of about 42,000 kilometers per hour. The collision spread about 1,000 pieces of debris capable of being tracked across the skies, where much of it remains.

    To avoid harm from potentially dangerous space debris, the International Space Station conducts a number of collision avoidance maneuvers each year.

    "An early warning system has the potential to protect the billions of dollars’ worth of vital infrastructure orbiting the earth but also prevent collisions that will result in even more space debris being generated…” said Tingay.

    This new space junk detection and tracking effort from Australia joins other programs like those run by space agencies such as NASA and ESA.

    You May Like

    Video As Refugees Perish, Greek Graveyards Fill

    Before burial at overflowing cemeteries, unidentified dead being swapped for DNA, in case some day relatives come to learn their fate

    Russian Opposition Leader Sues Putin for Conflict of Interest

    Alexei Navalny tells VOA in exclusive interview why transfer of $2 billion from country’s wealth fund to company with ties to President Putin’s son-in-law triggered lawsuit

    Clinton, Sanders Fight for African American Votes

    Some African American lawmakers lining up to support Clinton in face of perceived surge by Sanders in race for Democratic nomination in presidential campaign

    Featured Videos

    Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
    As Refugees Perish, Greek Graveyards Filli
    X
    Hamada Elsaram
    February 11, 2016 8:01 PM
    Aid workers on the Greek island of Lesbos say they are struggling to bury the increasing number of bodies of refugees that have been recovered or washed up ashore in recent months.  The graveyards are all full, they say, yet as tens of thousands of people clamor to get out of Syria, it is clear refugees will still be coming in record numbers. For VOA, Hamada Elrasam reports from Lesbos, Greece.
    Video

    Video As Refugees Perish, Greek Graveyards Fill

    Aid workers on the Greek island of Lesbos say they are struggling to bury the increasing number of bodies of refugees that have been recovered or washed up ashore in recent months.  The graveyards are all full, they say, yet as tens of thousands of people clamor to get out of Syria, it is clear refugees will still be coming in record numbers. For VOA, Hamada Elrasam reports from Lesbos, Greece.
    Video

    Video To Fight Zika, Scientists Target Mosquitoes

    Mosquitoes strike again. The Zika virus outbreak is just the latest headline-grabbing epidemic carried by these biting pests, but researchers are fighting back with new ways to control them. VOA's Steve Baragona takes a look.
    Video

    Video Mosul Refugees Talk About Life Under IS

    A top U.S. intelligence official told Congress this week that a planned Iraqi-led operation to re-take the city of Mosul from Islamic State militants is unlikely to take place this year. IS took over the city in June 2014, and for the past year and a half, Mosul residents have been held captive under its rule. VOA's Zana Omar talked to some families who managed to escape. Bronwyn Benito narrates his report.
    Video

    Video Scientists Make Progress Toward Better Diabetes Treatment, Cure

    Scientists at two of the top U.S. universities say they have made significant advances in their quest to find a more efficient treatment for diabetes and eventually a cure. According to the International Diabetes Federation, the disease affects more than 370 million people worldwide. VOA’s George Putic reports.
    Video

    Video NATO to Target Migrant Smugglers

    NATO has announced plans to send warships to the Aegean Sea to target migrant smugglers in the alliance's most direct intervention so far since a wave of people began trying to reach European shores.
    Video

    Video Russia's Catholics, Orthodox Hopeful on Historic Pope-Patriarch Meeting

    Russia's Catholic minority has welcomed an historic first meeting Friday in Cuba between the Pope and the Patriarch of Russia's dominant Orthodox Church. The Orthodox Church split with Rome in 1054 and analysts say politics, both church and state, have been driving the relationship in the centuries since. VOA's Daniel Schearf reports from Moscow.
    Video

    Video Used Books Get a New Life on the Streets of Lagos

    Used booksellers are importing books from abroad and selling them on the streets of Africa's largest city. What‘s popular with readers may surprise you. Chris Stein reports from Lagos.
    Video

    Video After NH Primaries All Eyes on South Carolina

    After Tuesday's primary in New Hampshire, US presidential candidates swiftly turned to the next election coming up in South Carolina. The so-called “first-in-the-South” poll may help further narrow down the field of candidates. Zlatica Hoke reports.
    Video

    Video US Co-ed Selective Service Plan Stirs Controversy

    Young women may soon be required to register with the U.S. Selective Service System, the U.S. government agency charged with implementing a draft in a national emergency. Top Army and Marine Corps commanders told the Senate Armed Services Committee recently that women should register, and a bill has been introduced in Congress requiring eligible women to sign up for the military draft. The issue is stirring some controversy, as VOA’s Bernard Shusman reports from New York.
    Video

    Video Lessons Learned From Ebola Might Help Fight Zika

    Now that the Ebola epidemic has ended in West Africa, Zika has the world's focus. And, as Carol Pearson reports, health experts and governments are applying some of the lessons learned during the Ebola crisis in Africa to fight the Zika virus in Latin America and the Caribbean.
    Video

    Video Smartphone Helps Grow Vegetables

    One day, you may be using your smartphone to grow your vegetables. A Taipei-based company has developed a farm cube — a small, enclosed ecosystem designed to grow plants indoors. The environment inside is automatically adjusted by the cube, but it can also be controlled through an app. VOA's Deborah Block has more on the gardening system.
    Video

    Video Illinois Voters Have Mixed Emotions on Obama’s Return to Springfield

    On the ninth anniversary of the launch of his quest for national office, President Barack Obama returned to Springfield, Illinois, to speak to the Illinois General Assembly, where he once served as state senator. His visit was met with mixed emotions by those with a front-row seat on his journey to the White House. VOA's Kane Farabaugh reports.
    Video

    Video Exhibit Turns da Vinci’s Drawings Into Real Objects

    In addition to being a successful artist, Renaissance genius Leonardo da Vinci designed many practical machines, some of which are still in use today, although in different forms. But a number of his projects were never realized — until today. VOA’s George Putic reports.
    Video

    Video Heated Immigration Debate Limits Britain’s Refugee Response

    Compared to many other European states, Britain has agreed to accept a relatively small number of Syrian refugees. Just over a thousand have arrived so far -- and some are being resettled in remote corners of the country. Henry Ridgwell reports on why Britain’s response has lagged behind its neighbors.
    Video

    Video Russia's Car Sales Shrink Overall, But Luxury and Economy Models See Growth

    Car sales in Russia dropped by more than a third in 2015 because of the country's economic woes. But, at the extreme ends of the car market, luxury vehicles and some economy brands are actually experiencing growth. VOA's Daniel Schearf reports from Moscow.