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 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