News / Science & Technology

Scientists: No Sign of Comet after Trip Around Sun

In frame grab taken from enhanced video made by NASA's STEREO-A spacecraft, comet ISON, left, approaches sun, Nov. 25, 2013.
In frame grab taken from enhanced video made by NASA's STEREO-A spacecraft, comet ISON, left, approaches sun, Nov. 25, 2013.
TEXT SIZE - +
VOA News
ISON's five-million-year journey from far reaches of solar system has apparently ended in a one-way trip around sun

Scientists say the comet ISON's five-million-year journey from the far reaches of the solar system has apparently ended in a one-way trip around the sun.

Astronomers say ISON and its long, bright tail passed just 1.2 million kilometers from the surface of the sun at 1837 UTC on Thursday.  A fleet of solar telescopes found no trace of the comet emerging from the other side.

At its closest point, ISON - traveling at 350 kilometers per second - encountered temperatures estimated at 2,700 degrees Celsius.  Scientists say those temperatures were hot enough to vaporize ices in the comet's body, as well as its dust and rock.

An astrophysicist tracking ISON from the U.S. Naval Research laboratory in Washington told NASA television he saw nothing coming from behind the solar disc.

Amateur Russian astronomers last year discovered ISON when it was still beyond the planet Jupiter.  The discovery tantalized scientists and star-gazers across the globe with the prospects of a spectacular naked-eye light show in the skies above Earth beginning late next month.

ISON is thought to have contained frozen debris from the formation of the solar system some 4.5 billion years ago.  Scientists say the comet was preserved in what is known as the Oort cloud, halfway to the nearest star from the sun.

You May Like

Multimedia Relatives of South Korean Ferry Victims Fire at Authorities

46 people are confirmed dead, but some 250 remain trapped inside sunken ferry More

War Legacy Haunts Vietnam, US Relations

$84 million project aims to clean up soil contaminated by Agent Orange More

Wikipedia Proves Useful for Tracking Flu

Technique gave better results than Center for Disease Control (CDC) and Google’s Flu Trends More

This forum has been closed.
Comment Sorting
Comments
     
by: Manas Dash from: India
November 30, 2013 3:45 AM
Every early morning we weak up before dawn to watch this celestial body. But it was not visible by either telescope or naked eye.

Featured Videos

Your JavaScript is turned off or you have an old version of Adobe's Flash Player. Get the latest Flash player.
Ukraine, Russia, United in Faith, Divided in Politicsi
X
Michael Eckels
April 19, 2014
There is a strong historical religious connection between Russia and Ukraine. But what role is religion playing in the current conflict? In the run-up to Easter, Michael Eckels in Moscow reports for VOA.
Video

Video Ukraine, Russia, United in Faith, Divided in Politics

There is a strong historical religious connection between Russia and Ukraine. But what role is religion playing in the current conflict? In the run-up to Easter, Michael Eckels in Moscow reports for VOA.
Video

Video Face of American Farmer is Changing

The average American farmer is now 58 years old, and farmers 65 and older are the fastest growing segment of the population. It’s a troubling trend signaling big changes ahead for American agriculture as aging farmers retire. Reporter Mike Osborne says a new report from the U.S. Census Bureau is suggesting what some of those changes might look like... and why they might not be so troubling.
Video

Video Donetsk Governor: Ukraine Military Assault 'Delicate But Necessary'

Around a dozen state buildings in eastern Ukraine remain in the hands of pro-Russian protesters who are demanding a referendum on self-rule. The governor of the whole Donetsk region is among those forced out by the protesters. He spoke to VOA's Henry Ridgwell from his temporary new office in Donetsk city.
Video

Video Drones May Soon Send Data From High Seas

Drones are usually associated with unmanned flying vehicles, but autonomous watercraft are also becoming useful tools for jobs ranging from scientific exploration to law enforcement to searching for a missing airliner in the Indian Ocean. VOA’s George Putic reports on sea-faring drones.
Video

Video New Earth-Size Planet Found

Not too big, not too small. Not too hot, not too cold. A newly discovered planet looks just right for life as we know it, according to an international group of astronomers. VOA’s Steve Baragona has more.
Video

Video Copts in Diaspora Worry About Future in Egypt

Around 10 percent of Egypt’s population belong to the Coptic faith, making them the largest Christian minority in the Middle East. But they have become targets of violence since the revolution three years ago. With elections scheduled for May and the struggle between the Egyptian military and Islamists continuing, many Copts abroad are deeply worried about the future of their ancient church. VOA religion correspondent Jerome Socolovsky visited a Coptic church outside Washington DC.
Video

Video Critics Say Venezuelan Protests Test Limits of Military's Support

During the two months of deadly anti-government protests that have rocked the oil-rich nation of Venezuela, President Nicolas Maduro has accused the opposition of trying to initiate a coup. Though a small number of military officers have been arrested for allegedly plotting against the government, VOA’s Brian Padden reports the leadership of the armed forces continues to support the president, at least for now.
Video

Video More Millenials Unplug to Embrace Board Games

A big new trend in the U.S. toy industry has more consumers switching off their high-tech gadgets to play with classic toys, like board games. This is especially true among the so-called millenial generation - those born in the 1980's and 90's. Elizabeth Lee has more from an unusual café in Los Angeles, where the new trend is popular and business is booming.
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.
AppleAndroid