News / Science & Technology

NASA Readies for Comet Flyby

NASA's Deep Impact spacecraft, illustrated in this artist's concept, has an appointment with comet Hartley 2, 28 Oct 2010
NASA's Deep Impact spacecraft, illustrated in this artist's concept, has an appointment with comet Hartley 2, 28 Oct 2010

A NASA spacecraft is closing in on the Hartley 2 comet to take photographs from a distance of about 700 kilometers.

In recent weeks, the Hartley 2 comet made one of the closest approaches to Earth of any comet in centuries.  On November 4, Hartley 2 will be close enough to NASA's Deep Impact spacecraft to give scientists the best ever extended view of a comet.

The spacecraft will use two telescopes with digital color cameras and an infrared spectrometer to gather detailed information, as the probe flies past the icy, dusty comet.

Tim Larson of NASA's Jet Propulsion Laboratory is project manager for the Extrasolar Planet Observation and Characterization, and Deep Impact Extended Investigation, or EPOXI, mission.  He says scientists are expecting the unexpected.

"Every time we fly by a comet, we're surprised with what we see," says Larson.  "We see new things that raise a lot of new questions."

The U.S. space agency says it is important to study comets because astronomers theorize they are part of a collection of gas, ice, rocks and dust that formed the outer planets of our solar system about 4.5 billion years ago.  Some scientists say that comets originally carried some of the water and organic compounds that make up life on our planet.

This will be the fifth time that a spacecraft has been close enough to photograph a comet's core.

"And so, this is a really unique opportunity to be able to go in and do some straight up comparison between two different comets, and being able to see what kind of features are common between them, what kind of features maybe are really primordial -- from when they're first formed and are common to all comets -- [and] what features change with each orbit as they come around the sun," Larson says.

The Hartley 2 comet is named for Malcolm Hartley, the astronomer who discovered it in 1986.

You May Like

Cambodia Seeks Official UN Maps for Vietnam Border

Notice of request comes as 2 countries open border talks Tuesday after a clash last month More

From South Africa to Vietnam, Cyclists Deliver Message Against Rhino Horns

Appalled by poaching they saw firsthand, sisters embark on tour to raise awareness in countries where rhino horn products are in demand More

Uber Wants Johannesburg Police Protection

Request follows recent protests outside ride-hailing service's Johannesburg office More

This forum has been closed.
Comments
     
There are no comments in this forum. Be first and add one

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
New Implant Could Help Restore Movement to Paralyzed Limbsi
|| 0:00:00
...    
🔇
X
Maia Pujara
July 07, 2015 10:01 PM
A half-million people suffer spinal cord injuries each year because of car accidents, serious falls and diseases, according to the World Health Organization. Researchers are now working on a soft but strong spinal cord implant that could one day restore movement in paralyzed individuals. VOA’s Maia Pujara reports.
Video

Video New Implant Could Help Restore Movement to Paralyzed Limbs

A half-million people suffer spinal cord injuries each year because of car accidents, serious falls and diseases, according to the World Health Organization. Researchers are now working on a soft but strong spinal cord implant that could one day restore movement in paralyzed individuals. VOA’s Maia Pujara reports.
Video

Video Getting it Done Beyond a Nuclear Deal

If a nuclear deal is reached between Iran and world powers in Vienna, it will be a highly technical road map to be used to monitor nuclear activity in Iran for years to come to ensure Tehran does not make nuclear weapons. Equally as complicated will be dismantling international sanctions that were originally intended to be ironclad. VOA’s Heather Murdock talks to experts about the key challenges any deal will present.
Video

Video Rice Farmers Frustrated As Drought Grips Thailand

A severe drought in Thailand is limiting the growing season of the country’s important rice crop. Farmers are blaming the government for not doing more to protect a key export. Steve Sandford reports from Chiang Mai, Thailand.
Video

Video Making Music, Fleeing Bombs: New Film on Sudan’s Internal Refugees

In 2012, Sudanese filmmaker Hajooj Kuka went to make a documentary among civil war refugees in Sudan’s Blue Nile and Nuba Mountains region. What he found surprised him: music was helping to save people from bombing raids by their own government. VOA’s Carolyn Weaver has more.
Video

Video 'From This Day Forward' Reveals Difficult Journey of Transgender Parent

In her documentary, "From This Day Forward", filmmaker Sharon Shattuck reveals the personal journey of her transgender father, as he told his family that he always felt he was a woman inside and decided to live as one. VOA’s Penelope Poulou has more.
Video

Video Floodwaters Threaten Iconic American Home

The Farnsworth House in the Midwest State of Illinois is one of the most iconic homes in America. Thousands of tourists visit the site every year. Its location near a river inspired the design of the house, but, as VOA’s Kane Farabaugh reports, that very location is now threatening the existence of this National Historic Landmark.
Video

Video Olympics Construction Scars Sacred Korean Mountain

Environmentalists in South Korea are protesting a Winter Olympics construction project to build a ski slope through a 500-year-old protected forest. Brian Padden reports that although there is strong national support for hosting the 2018 Pyeongchang Winter Olympics, there are growing public concerns over the costs and possible ecological damage at the revered mountain.
Video

Video Xenophobia Victims in South Africa Flee Violence, Then Return

Many Malawians fled South Africa early this year after xenophobic attacks on African immigrants. But many quickly found life was no better at home and have returned to South Africa – often illegally and without jobs, and facing the tough task of having to start over. Lameck Masina and Anita Powell file from Johannesburg.
Video

Video Family of American Marine Calls for Release From Iranian Prison

As the crowd of journalists covering the Iran talks swells, so too do the opportunities for media coverage.  Hoping to catch the attention of high-level diplomats, the family of American-Iranian marine Amir Hekmati is in Vienna, pleading for his release from an Iranian prison after nearly 4 years.  VOA’s Heather Murdock reports from Vienna.
Video

Video UK Holds Terror Drill as MPs Mull Tunisia Response

After pledging a tough response to last Friday’s terror attack in Tunisia, which came just days before the 10th anniversary of the bomb attacks on London’s transport network, British security services are shifting their focus to overseas counter-terror operations. VOA's Henry Ridgwell has more.
Video

Video Hate Groups Spread Influence Via Internet

Hate groups of various kinds are using the Internet for propaganda and recruitment, and a Jewish human rights organization that monitors these groups, the Simon Wiesenthal Center, says their influence is growing. The messages are different, but the calls to hatred or violence are similar. VOA's Mike O’Sullivan reports.
Video

Video Blind Somali Journalist Defies Odds in Mogadishu

Despite improving security in the last few years, Somalia remains one of the most dangerous countries to be a journalist – even more so for someone who cannot see. Abdulaziz Billow has the story of journalist Abdifatah Hassan Kalgacal, who has been reporting from the Somali capital for the last decade despite being blind.

VOA Blogs