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Thursday, June 23, 2011

NASA’s Cassini–Huygens spacecraft has discovered evidence for a large-scale saltwater reservoir beneath the icy crust of Saturn’s moon Enceladus. The data came from the spacecraft’s direct analysis of salt-rich ice grains close to the jets ejected from the moon. The study has been published in this week’s edition of the journal Nature.

Data from Cassini’s cosmic dust analyzer show the grains expelled from fissures, known as tiger stripes, are relatively small and usually low in salt far away from the moon. Closer to the moon’s surface, Cassini found that relatively large grains rich with sodium and potassium dominate the plumes. The salt-rich particles have an “ocean-like” composition and indicate that most, if not all, of the expelled ice and water vapor comes from the evaporation of liquid salt-water. When water freezes, the salt is squeezed out, leaving pure water ice behind.

Cassini’s ultraviolet imaging spectrograph also recently obtained complementary results that support the presence of a subsurface ocean. A team of Cassini researchers led by Candice Hansen of the Planetary Science Institute in Tucson, Arizona, measured gas shooting out of distinct jets originating in the moon’s south polar region at five to eight times the speed of sound, several times faster than previously measured. These observations of distinct jets, from a 2010 flyby, are consistent with results showing a difference in composition of ice grains close to the moon’s surface and those that made it out to the E ring, the outermost ring that gets its material primarily from Enceladean jets. If the plumes emanated from ice, they should have very little salt in them.

“There currently is no plausible way to produce a steady outflow of salt-rich grains from solid ice across all the tiger stripes other than salt water under Enceladus’s icy surface,” said Frank Postberg, a Cassini team scientist at the University of Heidelberg in Germany.

The data suggests a layer of water between the moon’s rocky core and its icy mantle, possibly as deep as about 50 miles (80 kilometers) beneath the surface. As this water washes against the rocks, it dissolves salt compounds and rises through fractures in the overlying ice to form reserves nearer the surface. If the outermost layer cracks open, the decrease in pressure from these reserves to space causes a plume to shoot out. Roughly 400 pounds (200 kilograms) of water vapor is lost every second in the plumes, with smaller amounts being lost as ice grains. The team calculates the water reserves must have large evaporating surfaces, or they would freeze easily and stop the plumes.

“We imagine that between the ice and the ice core there is an ocean of depth and this is somehow connected to the surface reservoir,” added Postberg.

The Cassini mission discovered Enceladus’ water-vapor and ice jets in 2005. In 2009, scientists working with the cosmic dust analyzer examined some sodium salts found in ice grains of Saturn’s E ring but the link to subsurface salt water was not definitive. The new paper analyzes three Enceladus flybys in 2008 and 2009 with the same instrument, focusing on the composition of freshly ejected plume grains. In 2008, Cassini discovered a high “density of volatile gases, water vapor, carbon dioxide and carbon monoxide, as well as organic materials, some 20 times denser than expected” in geysers erupting from the moon. The icy particles hit the detector target at speeds between 15,000 and 39,000 MPH (23,000 and 63,000 KPH), vaporizing instantly. Electrical fields inside the cosmic dust analyzer separated the various constituents of the impact cloud.

“Enceladus has got warmth, water and organic chemicals, some of the essential building blocks needed for life,” said Dennis Matson in 2008, Cassini project scientist at NASA’s Jet Propulsion Laboratory in Pasadena, California.

“This finding is a crucial new piece of evidence showing that environmental conditions favorable to the emergence of life can be sustained on icy bodies orbiting gas giant planets,” said Nicolas Altobelli, the European Space Agency’s project scientist for Cassini.

“If there is water in such an unexpected place, it leaves possibility for the rest of the universe,” said Postberg.

Monday, May 14, 2007

Buffalo, New York —A massive warehouse complex of at least 5 buildings caught on fire in Buffalo, New York on 111 Tonawanda Street, sending a plume of thick, jet black colored smoke into the air that could be seen as far away as 40 miles.

As of 6:40 a.m., the fire was under control, and firefighters were attempting to stop it from spreading, but could not get to the center of the fire because of severe amounts of debris. Later in the morning, the fire was extinguished.

“The fire is mostly under debris at this point. It’s under control, but it’s under some debris. We really can’t get to it. We’re just going to have to keep on pouring water on it so it doesn’t spread,” said Thomas Ashe, the fire chief for the North Buffalo based fire division who also added that at one point, at least 125 firefighters were on the scene battling the blaze. One suffered minor injures and was able to take himself to the hospital to seek medical attention.

Shortly after 8:00 p.m. as many as 3 explosions rocked the warehouse sending large mushroom clouds of thick black smoke into the air. After the third explosion, heat could be felt more than 100 feet away. The fire started in the front, one story building then quickly spread to three others, but fire fighters managed to stop the flames from spreading onto the 3 story building all the way at the back.

According to a Buffalo Police officer, who wished not to be named, the fire began at about 7:00 p.m. [Eastern time], starting as a one alarm fire. By 8:00 p.m., three fire companies were on the scene battling the blaze. Police also say that a smaller fire was reported in the same building on Saturday night, which caused little damage.

At the start of the fire, traffic was backed up nearly 4 miles on the 198 expressway going west toward the 190 Interstate and police had to shut down the Tonawanda street exit because the road is too close to the fire.

At one point, traffic on the 198 was moving so slow, at least a dozen people were seen getting out of their cars and walking down the expressway to watch the fire. That prompted as many as 10 police cars to be dispatched to the scene to force individuals back into their cars and close off one of the 2 lanes on the westbound side.

One woman, who wished not to be named as she is close to the owner of the warehouse, said the building is filled with “classic cars, forklifts, and money” and that owner “does not have insurance” coverage on the property. The building is not considered abandoned, but firefighters said that it is vacant.

Officials in Fort Erie, Ontario were also swamped with calls to fire departments when the wind blew the smoke over the Niagra River and into Canada.

It is not known what caused the fire, but a car is suspected to have caught on fire and there are reports from police and hazmat crews, that there were also large barrels of diesel fuel being stored in one building. Firefighters say the cause of the blaze is being treated as “suspicious.” The ATF is investigating the fire and will bring dogs in to search the debris.

Tuesday, February 19, 2008

While nearly all coverage of the 2008 Presidential election has focused on the Democratic and Republican candidates, the race for the White House also includes independents and third party candidates. These parties represent a variety of views that may not be acknowledged by the major party platforms.

Wikinews has impartially reached out to these candidates, throughout the campaign. We now interview independent Presidential candidate Ruth Bryant White, an ordained Christian minister, author, and homemaker.

Saturday, June 25, 2005

Seven months after suspicions were first raised, United States Agriculture Secretary Mike Johanns confirmed that a second American cow has tested positive for BSE (also known as ‘mad cow disease’), as determined by a lab in Weybridge, England. The department believes that this cow was born in the United States.

The delay in confirmation followed two conflicting test results from last November. The “Western blot” test, which is a more sophisticated test, could have helped reach a final determination, but the U.S. refused to perform it in November. The department’s inspector general, Phyllis Fong, ordered the Western blot test in June without advising Johanns and by the time Johanns found out about it, the testing was under way.

Johanns was annoyed that the round of testing which confirmed “Mad Cow” had been ordered without him being consulted first.”I was asked by the Senate and the president to operate the department,” Johanns said. “I believe, in this area, very clearly, the secretary should be consulted, whoever the secretary is, before testing is undertaken. From my standpoint, I believe I was put there to operate the department and was very disappointed.”

A senior research associate with Consumers Union, Michael Hansen, said USDA officials “almost sound like some Keystone Kops.”

Johanns reassured Americans that they should not be afraid of eating beef, saying: “This animal was blocked from entering the food supply because of the firewalls we have in place. Americans have every reason to continue to be confident in the safety of our beef.”

On June 17, the Associated Press reported: “American cattle are eating chicken litter, cattle blood and restaurant leftovers that could help transmit mad cow disease — a gap in the U.S. defense that the Bush administration promised to close nearly 18 months ago.”

John Stauber, co-author of “Mad Cow USA: Could the Nightmare Happen Here?” said: “Once the cameras were turned off and the media coverage dissipated, then it’s been business as usual, no real reform, just keep feeding slaughterhouse waste. The entire U.S. policy is designed to protect the livestock industry’s access to slaughterhouse waste as cheap feed.”

Critics of the U.S. testing regimen said the fumbles this time increase their concerns about America’s screening process.

“How can we be sure they were really negative?” Craig Culp, a spokesman for the Center for Food Safety asked; “After all, (here is a cow that was) negative in November that is positive in June.”

The companies which render slaughter waste say new restrictions are not warranted. “We process about 50 billion pounds of product annually — in visual terms, that is a convoy of semi trucks, four lanes wide, running from New York to L.A. every year,” said Jim Hodges, president of the American Meat Institute Foundation.

Monday, February 14, 2005

Electronics retailer Best Buy said today that it signed leases for 28 new stores. This is part of the company’s plan to build 60 new stores this year. Best Buy, the largest consumer electronics retailer in the United States, declined to discuss the terms of the leases but did say that the new stores will result in the addition of 3,500 more jobs to the corporate payroll.

Tuesday, July 17, 2007

Pittsburgh, Pennsylvania — Local caterers get ready for big business, as almost three thousand fans converge on the David L. Lawrence Convention Center over the Independence Day weekend for the world’s largest ever furry convention, Anthrocon 2007.

Many hope to renew acquaintances, or meet new friends. Others look to buy from dealers and artists, or show off new artwork or costumes. Some attend to make money, or even learn a thing or two. But one thing unites them: They’re all there to have fun.

Thursday, June 26, 2008

Gunmen today opened fire in a Mexico City restaurant, killing a top police official in charge of monitoring the country’s illegal drug trade, as well as one of his bodyguards, Mexican officials said. The attack is the latest waged against authorities attempting to fight Mexico’s powerful drug cartels.

Security officials in Mexico City say the attack occurred as Igor Labastida Calderón, commander of the federal police‘s Traffic and Contraband division, was eating lunch with one of his bodyguards, Jose Maria Ochoa. According to Minerva Amado, spokesperson for the attorney general’s office, two unknown subjects got out of a black vehicle, entered the restaurant, and opened fire on Labastida Calderón.

Reports differ on who else was injured in the attack. Amado said two other bodyguards were injured and hospitalized, while Mexico City newspaper El Universal reports that three civilians were injured.

The motive for the attack remains unclear. No arrests have been made so far, as police continue to search for the assailants. Federal police have refused to comment.

President Felipe Calderón has sent over 20,000 troops throughout Mexico in an attempt to take back areas controlled by the country’s drug cartels. Since Calderón took office in December 2006, more than 4,000 people have been killed by these drug cartels, allegedly including federal police chief Édgar Millán Gómez, whose May death was attributed to the Sinaloa Cartel.