News / Science & Technology

NASA Prepares for Next Solar Mission

NASA Mission to Probe Sun's Mysteriesi
X
June 24, 2013 9:18 PM
NASA, the U.S. space agency, is preparing to launch a mission to study the sun, specifically its mysterious interface region, the area between the sun's surface and its corona or upper atmosphere. VOA's Suzanne Presto in Washington has more about the Interface Region Imaging Spectrograph, or IRIS, which is set to launch from Vandenberg Air Force Base in California on June 27.
Suzanne Presto
The U.S. space agency NASA is preparing to launch a new mission to study the sun. The Interface Region Imaging Spectrograph, or IRIS, will observe the way solar material gathers energy and heats up as it moves through the sun's lower atmosphere.

The upper layer of the sun's atmosphere, known as the corona, is thousands of times hotter than the sun's surface.  

Scientists want to figure out how that happens, so they are preparing a mission to study the sun's so-called interface region, the area between the sun's photosphere and its corona.  

Energy and plasma that flow through the interface region have an impact on us here on Earth. That region is the source of the sun's ultraviolet emission, which has an effect on our planet's climate, as well as the near-Earth space environment. Energy that seeps through the interface region drives solar wind.    

That's where NASA's Interface Region Imaging Spectrograph, or IRIS, mission comes into play. IRIS is a small satellite with the ability to perform complex solar observations.

Alan Title, the IRIS principal investigator based at Lockheed Martin's Advanced Technology Center in California, spoke to reporters about the mission's importance.

"What we want to discover is what the basic physical processes are that transfer energy and material from the surface of the sun out to the outer atmosphere to the corona," he explained. "And, remember, the corona extends throughout the heliosphere. We live in the sun's outer atmosphere."

High-resolution images & high temperatures

IRIS will provide high-resolution images that even will show individual structures of energy as they rapidly stretch away from the sun. The U.S. space agency says IRIS images will be three-to-four times as detailed as those from NASA's Solar Dynamics Observatory.  

IRIS also will provide spectra, data that reveals information about multiple wavelengths of light at once.

NASA says IRIS will observe a range of temperatures from about 5,000 to 65,000 degrees Celsius, and up to about 10 million degrees Celsius during solar flares. But IRIS will not be observing the sun from up close.

"IRIS flies around the Earth so it only gets about 600 kilometers closer to the sun than we are here on Earth, and that's about 92 million miles away," said principal investigator Alan Title. "So it's really not very much closer to the sun."

The $181 million mission is set to last two years, but scientists say the solar explorer could function much longer.  

IRIS is set to launch aboard a Pegasus XL rocket from Vandenberg Air Force Base in California on June 26.

You May Like

Video Falling Gas Prices Impact US Oil Extraction

With the price of oil now less than $80 a barrel, motorists throughout the US are seeing gas prices dip below $3 a gallon More

Afghan Women's Soccer Team Building for the Future

A four-team female league was recently set up in Kabul; It will help identify players for the national team More

Video Koreas on Edge Amid Live-fire Drills

Pyongyang threatens nuclear test as joint US, S. Korean exercises show forces’ capabilities More

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
New Skateboard Defies Gravityi
X
November 21, 2014 5:07 AM
A futuristic dream only a couple of decades ago, the hoverboard – a skateboard that floats above the ground - has finally been made possible. While still not ready for mass production, it promises to become a cool mode of transport... at least over some surfaces. VOA’s George Putic reports.
Video

Video New Skateboard Defies Gravity

A futuristic dream only a couple of decades ago, the hoverboard – a skateboard that floats above the ground - has finally been made possible. While still not ready for mass production, it promises to become a cool mode of transport... at least over some surfaces. VOA’s George Putic reports.
Video

Video Falling Gas Prices Impact US Oil Extraction

With the price of oil now less than $80 a barrel, motorists throughout the United States are benefiting from gas prices below $3 a gallon. But as VOA’s Kane Farabaugh reports, the decreasing price of petroleum has a downside for the hydraulic fracturing industry in the United States.
Video

Video Tensions Build on Korean Peninsula Amid Military Drills

It has been another tense week on the Korean peninsula as Pyongyang threatened to again test nuclear weapons while the U.S. and South Korean forces held joint military exercises in a show of force. VOA’s Brian Padden reports from the Kunsan Air Base in South Korea.
Video

Video Mama Sarah Obama Honored at UN Women’s Entrepreneurship Day

President Barack Obama's step-grandmother is in the United States to raise money to build a $12 million school and hospital center in Kogelo, Kenya, the birthplace of the president's father, Barack Obama, Sr. She was honored for her decades of work to aid poor Kenyans at a Women's Entrepreneurship Day at the United Nations.
Video

Video Gay Evangelicals Argue That Bible Does Not Condemn Homosexuality

More than 30 U.S. states now recognize same-sex marriages, and an increasing number of mainline American churches are blessing them. But evangelical church members- which account for around 30 percent of the U.S. adult population - believe the Bible unequivocally condemns homosexuality. VOA's Jerome Socolovsky reports that gay, lesbian, bisexual and transgender evangelicals are coming out. Backed by a prominent evangelical scholar, they argue that the traditional reading of the bible is wrong.
Video

Video Ebola Economic Toll Stirs W. Africa Food Security Concerns

The World Bank said Wednesday that it expects the economic impact of the Ebola outbreak on the sub-Saharan economy to cost somewhere betweenf $3 billion to $4 billion - well below a previously-outlined worst-case scenario of $32 billion. Some economists, however, paint a gloomier picture - warning that the disruption to regional markets and trading is considerable. Henry Ridgwell reports from London.
Video

Video Mexico Protests Escalate Over Disappearances

Protests in Mexico over 43 students missing since September continue to escalate, reflecting growing anger among Mexicans about a political system they view as corrupt, and increasingly tainted by the drug trade. Mounting outrage over the disappearances is now focused on the government of President Enrique Pena Nieto, accused of not doing enough to end insecurity in the country. More from VOA's Victoria Macchi.
Video

Video US Senate Votes Down Controversial Oil Pipeline - For Now

The U.S. Senate has rejected construction of a controversial pipeline to transport Canadian oil to American refineries. The $5 billion project still could be approved next year, but it faces a possible veto by President Barack Obama. As VOA’s Michael Bowman reports, the pipeline has exposed deep divisions in Congress about America’s energy future.
Video

Video Can Minsk Cease-fire Agreement Hold?

Growing tensions between government troops and separatists in eastern Ukraine further threaten a cease-fire agreement reached two months ago in the Belarusian capital of Minsk. Critics of U.S. policy in Ukraine say it is time the Obama administration gives up on that much-violated cease-fire and moves toward a new deal with Russia. VOA's Scott Stearns has more.
Video

Video Chaos, Abuse Defy Solution in Libya

The political and security crisis in Libya is deepening, with competing governments and, according to Amnesty International, widespread human rights violations committed with impunity. VOA’s Al Pessin reports from London.
Video

Video US Hosts Record 866,000 Foreign Students

Close to 900,000 international students are studying at American universities and colleges, more than ever before. About half of them come from Asia, mostly China. The United States hosts more foreign students than any other country in the world, and its foreign student population is steadily growing. Zlatica Hoke reports.
Video

Video Ferguson Church Grapples with Race Relations

Many white residents of Ferguson, Missouri, say they chose to live there because of the American Midwest community's diversity. So, they were shocked when a white police officer killed an unarmed black teenager in August – and shaken by the resulting protests and violence. Some local churches are leading conversations on how to go forward. VOA’s Ayesha Tanzeem reports.

All About America

AppleAndroid