News / Science & Technology

Evidence of Water Plumes Spotted on Europa

This is an artist's concept of a plume of water vapor thought to be ejected off of the frigid, icy surface of the Jovian moon Europa, located 500 million miles from the Sun.
This is an artist's concept of a plume of water vapor thought to be ejected off of the frigid, icy surface of the Jovian moon Europa, located 500 million miles from the Sun.

Related Articles

Scientists: No Sign of Comet after Trip Around Sun

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

Video Juno Probe Captures Stunning Earth-Moon Dance

Video shows what it might look like to approach the Earth and moon in a spacecraft

Image Captures Saturn, Mars, Earth and Venus

The image is actually a mosaic of 141 wide-angle photos taken by the Cassini probe
VOA News
NASA says it has spotted evidence of large water plumes shooting 200 kilometers over Jupiter’s moon Europa.

Using the Hubble Space Telescope, astronomers found water vapor above the moon’s south pole, which they say is likely from plumes of water shooting out of large ocean under Europa’s icy crust.

"By far the simplest explanation for this water vapor is that it erupted from plumes on the surface of Europa," said Lorenz Roth of Southwest Research Institute in San Antonio, Texas, lead author of a paper about the discovery.

He added that the discovery could make it easier to determine if life exists in the liquid ocean.

"If those plumes are connected with the subsurface water ocean we are confident exists under Europa's crust, then this means that future investigations can directly investigate the chemical makeup of Europa's potentially habitable environment without drilling through layers of ice," he said. "And that is tremendously exciting."

Evidence of water plumes was first spotted by Hubble a year ago using the imaging spectograph to detect a “telltale” “aural glow” created by water molecules being broken apart by electrons along magnetic field lines.

One reason for the plumes might be that large cracks along the icy surface are pushed and pulled by Jupiter’s gravity, allowing water to escape.

The Hubble team found that the intensity of Europa's plumes, like that Enceladus's plumes, varies with the moon's orbital position. Active jets have been seen only when Europa is farthest from Jupiter. But the researchers could not detect any sign of venting when Europa is closer to Jupiter.

The study appeared today’s online issue of Science Express, and was reported at the meeting of the American Geophysical Union in San Francisco.

You May Like

Video VOA ‘Town Hall’ Shines Light on Ebola Crisis

Experts call for greater speed in identification and treatment of deadly disease More

UN Rights Commission Investigates Eritrea

Three-member commission will start collecting first-hand information from victims and other witnesses in Switzerland and Italy next week More

Funding Program Helps Extremely Poor in Ghana

Broad objective for Ghana's social cash transfer program is to lessen the impact of poverty on the most vulnerable people, elderly, orphans, those with disabilities 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.
Ebola Economic Toll Stirs W. Africa Food Security Concernsi
X
November 19, 2014 11:39 PM
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 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.
Video

Video What Jon Stewart Learned About Iran From 'Rosewater'

Jon Stewart, host of the satirical news program "The Daily Show" talks with Saman Arbabi of Voice of America's Persian service about Stewart's directorial debut, "Rosewater."
Video

Video Lebanese Winemakers Thrive Despite War Next Door

In some of the most volatile parts of Lebanon, where a constant flow of refugees crosses the border from Syria, one industry continues to flourish against the odds. Lebanese winemakers say after surviving a brutal civil war in the 1970s and 80s, they can survive anything. Heather Murdock has more for VOA from the Bekaa Valley in Lebanon.
Video

Video China's Rise Closely Watched

China’s role as APEC host this week allowed a rare opportunity for Beijing to showcase its vision for the global economy and the region. But as China’s stature grows, so have tensions with other countries, including the United States. VOA’s Bill Ide in Beijing reports on how China’s rise as a global power is seen among Chinese and Americans.

All About America

AppleAndroid