News / Science & Technology

Scientists Debate, Prepare for Killer Asteroid

Scientists Debate, Prepare For Killer Asteroidi
X
November 19, 2013
Earthquakes, Tsunamis, Volcanoes. Now, add asteroids to the list of natural disasters that can threaten humanity and all life on our planet. VOA’s Adam Phillips has more on giant space rocks and what might be done to prevent a fateful rendezvous with these orbiting nemeses.
TEXT SIZE - +
Adam Phillips
— Earthquakes,  Tsunamis,  Volcanoes.  Now, add asteroids to the list of natural disasters that can threaten humanity and all life on our planet. 
 
For decades, Hollywood films like Deep Impact and Armageddon have let  moviegoers enjoy the terror of fictional earthbound asteroids from the safety of their seats.
 
But on February 15th of this year, residents of Chelyabinsk in central Russia discovered that the threat is as real as it gets.  

That meteorite wounded more than 1,000 people - a pinprick compared to the one that probably wiped out the dinosaurs 65 million years ago, and far more benign than the meteor that exploded over Siberia in1908, leveling more than 2,000 square kilometers of forest.

Or the meteorite that hit present day Arizona, 50,000 years ago, and made a crater large enough to swallow up the entire city of San Francisco.

But those strikes were no flukes.

There are an estimated 10,000 known asteroids orbiting our region of the inner solar system.  That’s just one percent of the million or more asteroids scientists believe to be our near neighbors in the inner Solar System.

Recently, at the American Museum of Natural History in New York, astrophysicist Neil deGrasse Tyson warned about....

" ...asteroids crashing to earth as meteorites or exploding in the atmosphere. That would be bad," he said.

He invited a group of concerned astronaut-scientists from the Association of Space Explorers, which included Thomas Jones.

“So one of these big explosions is capable of causing a global shutdown in agriculture and starving billions of people to death, as well as those who are killed by the actual explosion itself.  Now small asteroids might level a city, but we could still lose hundreds of thousands of people," said Jones.

Asteroids are chunks of dark mineral rich rock that reflect almost no sunlight, so they are hard to spot from Earth.  But infrared sensors on a space-based telescope could detect the heat they have absorbed from the sun.

That will be the job of the Sentinel Deep Space Telescope, bristling with infrared sensors, along with mapping and communications gear.  The Sentinel mission is the brainchild of former astronaut Edward Lu and his B612 Foundation, which is committed to reducing the asteroid threat.  Sentinel is scheduled to launch in 2018.

“Our telescope is sensitive enough that you actually can see a charcoal briquette against a black sky from ten times the distance from New York to Los Angeles," said Lu.

Once the asteroids are spotted and their orbits determined, an earthbound asteroid can be nudged slightly off course with a satellite deflector or a high velocity projectile, or blown up with nuclear weapons, causing it to miss its deadly rendezvous.

Much like Hollywood imagined it would in the 1957 science fiction film The Day the Sky Exploded.
 
But this time it’s the real world that would be saved.  

Video production by Daniela Schrier.

You May Like

Analysts Warn of Regional Proxy Conflict in Afghanistan

Analysts warn if Kabul’s neighbors do not start to cooperate, competing desires for influence could deteriorate into a bloody proxy war in the country More

Saudi Intelligence Chief Replaced

Bandar bin Sultan came under criticism for supporting al Qaida, prompting King Abdallah to wrest Syria operations away from him in February, handing them to Interior Minister Prince Mohammed bin Nayef More

Poetry Magazine editor Don Share talks what makes a good poem with VOA's David Byrd

What makes a good poem? And is poetry as viable an art form as it once was? To find out, VOA's David Byrd spoke to Don Share, the editor of Poetry Magazine. More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Google Buys Drone Companyi
|| 0:00:00
...
 
🔇
X
George Putic
April 15, 2014
In its latest purchase of high-tech companies, Google has acquired a manufacturer of solar-powered drones that can stay in the air almost indefinitely, relaying broadband Internet connection to remote areas. It is seen as yet another step in the U.S. based Web giant’s bid to bring Internet to the whole world. VOA’s George Putic reports.
Video

Video Google Buys Drone Company

In its latest purchase of high-tech companies, Google has acquired a manufacturer of solar-powered drones that can stay in the air almost indefinitely, relaying broadband Internet connection to remote areas. It is seen as yet another step in the U.S. based Web giant’s bid to bring Internet to the whole world. VOA’s George Putic reports.
Video

Video Ray Bonneville Sings the Blues and More on New CD

Singer/songwriter Ray Bonneville has released a new CD called “Easy Gone” with music that reflects his musical and personal journey from French-speaking Canada to his current home in Austin,Texas. The eclectic artist’s fan base extends from Texas to various parts of North America and Europe. VOA’s Greg Flakus reports from Austin.
Video

Video Millions Labor in Pakistan's Informal Economy

The World Bank says that in Pakistan, roughly 70 percent work in the so-called informal sector, a part of the economy that is unregulated and untaxed. VOA's Sharon Behn reports from Islamabad on how the informal sector impact's the Pakistani economy.
Video

Video Passover Celebrates Liberation from Bondage

Jewish people around the world are celebrating Passover, a commemoration of their liberation from slavery in Egypt more than 3,300 years ago. According to scripture, God helped the Jews, led by Moses, escape bondage in Egypt and cross the Red Sea into the desert. Zlatica Hoke reports that the story of the Jewish Exodus resonates with other people trying to escape slave-like conditions.
Video

Video Police Pursue Hate Crime Charges Against Kansas Shooting Suspect

Prosecutors are sifting through the evidence in the wake of Sunday’s shootings in a suburb of Kansas City, Missouri that left three people dead. A suspect in the shootings taken into custody is a white supremacist. As VOA’s Kane Farabaugh reports, he was well-known to law enforcement agencies and human rights groups alike.
Video

Video In Eastern Ukraine, Pro-unity Activists Emerge from Shadows

Amid the pro-Russian uprisings in eastern Ukraine, there is a large body of activists who support Ukrainian unity and reject Russian intervention. Their activities have remained largely underground, but they are preparing to take on their pro-Moscow opponents, as Henry Ridgwell reports from the eastern city of Donetsk.
Video

Video Basket Maker’s Skills Have World Reach

A prestigious craft show in the U.S. capital offers one-of-a-kind creations by more than 120 artists working in a variety of media. As VOA’s Julie Taboh reports from Washington, one artist lucky enough to be selected says sharing her skills with women overseas is just as significant.
Video

Video UN Report Urges Speedier Action to Avoid Climate Disaster

A new United Nations report says the world must switch from fossil fuels to cleaner energy sources to control the effects of climate change. The Intergovernmental Panel on Climate Change released the report (Sunday) following a meeting of scientists and government representatives in Berlin. The comprehensive review follows two recent IPCC reports that detail the certainty of climate change, its impacts and in this most recent report what to do about it. VOA’s Rosanne Skirble has the details.
AppleAndroid