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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.
Wednesday, November 8, 2006
As of 10:00 p.m EST November 8, 2006, the Democratic Party is projected to have gained control of both the United States House of Representatives and the United States Senate in the 2006 United States general elections. MSNBC projects that the Democrats now control 234 seats in the House of Representatives, 16 more seats than the 218 needed to control the House of Representatives as all 435 seats were up for election. In the Senate, where the balance of power is closer, one-third of all seats were up for grab. As of 10:00 p.m. EST, AP and Reuters were projecting that the Democrats had picked up all six seats they needed to retake the Senate, including the seats of incumbents Rick Santorum (Penn.), Lincoln Chafee (R.I.), Jim Talent (Missouri), Mike DeWine (Ohio), Jon Tester (Montana), and Jim Webb (VA). The Tester victory by less than 3,000 votes was projected at approximately 2 p.m. EST after the State of Montana announced the results of overnight recounts. Democrat Jim Webb has prevailed in that race by slightly more than 7,000 votes, though his opponent has not conceded and a recount may still occur.
Tuesday, October 3, 2006
Gol Transportes Aéreos Flight 1907 crashed 1,750km (1,100 miles) north-west of Rio de Janeiro killing all people onboard, on Friday September 29. National Civil Aviation Agency (ANAC) has confirmed that the crashed Brazilian airplane did crash into a smaller aircraft. Rescue workers and air force personnel are searching the wreckage for bodies
Saturday, October 11, 2008
In the midst of the intensifying global financial crisis, finance ministers and central bankers of the G7 nations – Canada, France, Germany, Italy, Japan, the United States, and the United Kingdom – met in Washington, D.C. and released a joint statement.
With failures of large financial institutions in the United States, the crisis rapidly evolved into a global crisis resulting in bank failures in Europe and the Americas, and sharp reductions in the value of stocks and commodities worldwide. The crisis further lead to a liquidity problem and the de-leveraging of world assets, which further accelerated the problem. The crisis has roots in the subprime mortgage crisis and is an acute phase of the financial crisis of 2007–2008.
After the meeting, a joint statement was released with a commitment to “stabilize financial markets and restore the flow of credit.” The statement outlined five steps to achieve these goals:
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“Central banks from around the world have acted together to provide additional liquidity for financial institutions, taking the necessary steps to support the global economy,” said US Secretary of the Treasury Henry Paulson in a statement after the meeting.
“We have taken a lot of actions,” said European Central Bank President Jean-Claude Trichet. “My experience of markets is that it always takes a little time to capture the elements [of the decisions taken].”
The Governor of the Bank of England Mervyn King said: “Central banks will work together as we demonstrated this week, to ensure sufficient short term liquidity is provided to stabilise banking systems. But it is also vital that governments work together to ensure their banking systems are recapitalised to enable them to lend to finance spending in the real economy.”
Saturday, April 23, 2011
Yao Jiaxin, a 21-year-old student at the Xi’an Conservatory of Music, was sentenced to death on Friday. Yao, from Xi’an in China’s Shaanxi province, was convicted of homicide after stabbing a cyclist to death.
On the night of October 20, 2010, Yao ran into 26-year-old cyclist and mother of a two-year-old, Zhang Miao, while driving his car. After he saw her writing down his vehicle’s license plate number following the accident, he feared she would report him, and proceeded to murder her by stabbing her six times. Prior to her murder, Zhang had suffered only minor injuries in the accident, according to police.
On October 23, after being accused of murdering her, Yao went to the local police station with his parents and confessed to the crime. He said he killed Zhang because she had seen his license plate number, and he feared that the “peasant woman would be hard to deal with.”
During a three-hour trial on March 23, 2011, Yao’s lawyer pleaded for a lenient sentence, saying it was a “crime of passion.” Yao tearfully described how he had been forced to play the piano, leading him to thoughts of suicide. But prosecutors and judges said Yao did not deserve leniency, as he had not attempted to help the woman after the accident but instead murdered her.
Public passions were raised and some thought Yao would get off through the influence of his family. The case triggered a public debate over the death penalty.
“The motive is extremely despicable … the measures are extremely cruel … and the consequence is extremely serious,” said the court in its judgment.
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.
Friday, September 11, 2009
A 19 year old from South Tyneside, England has been banned from looking after animals after stealing a cat and forcing it to inhale cannabis.
Mark Kane, from South Shields, England, was banned from looking after animals for 10 years after causing “unnecessary suffering” to a tabby cat in January 2009. Kane was originally sentenced to three months in jail which was suspended two years. Kane also has to pay £100 (US$167) in fines.
Kane had stolen the cat from a friend of his girlfriend. A mobile phone camera recorded the incident and showed Kane putting the cat into a bag, inhaling some cannabis and blowing it into the bag. He then swung the bag around his head in a similar fashion to a lasso. The cat survived the attack but it ran off afterwards and has yet to have been found. During the video Kane is quoted as saying “This cat is getting stoned off its head” and “Get it stoned to fuck”.
| This was a vile offence. | ||
Kane was prosecuted by the Royal Society for the Prevention of Cruelty to Animals in a court in South Shields. He was found guilty and sentenced to twelve weeks in prison, two years suspension and a ten year ban from looking after animals as well as being ordered to pay £100 costs. In a previous court hearing, Kane had also admitted two counts of cruelty to animals.
Chairman of the Bench Ken Buck said, “We do think the charges of animal cruelty are appalling in nature and caused real stress and unnecessary suffering to a domestic pet which was in your care.” Clive McKeag, who was prosecuting Kane on behalf of the RSPCA described the attack as “sadistic and wicked” and stated: “This was a vile offence.”
In regards to the case, RSPCA inspector Claire Hunt said, “He thought it was a funny thing to do to a defenseless animal.” Claire also stated that she was happy with Kane’s sentencing saying, “It deters people from doing the same thing.”
Monday, June 2, 2008
Today, United States Senator Ted Kennedy underwent surgery for a brain tumor at Duke University Medical Center. Kennedy, 76, was diagnosed with malignant glioma, a common but dangerous form of cancer, after suffering a seizure on May 17.
Kennedy has met repeatedly with friend and medical advisor Dr. Lawrence C. Horowitz to plan a course of treatment. The first, of the major phases of that treatment has now been completed, and it is expected that chemotherapy and radiotherapy will follow.
“I am pleased to report that Senator Kennedy’s surgery was successful and accomplished our goals,” said Dr. Allan Friedman, the chief of neurosurgery at Duke, who performed the surgery. “After a brief recuperation, he will begin targeted radiation at Massachusetts General Hospital and chemotherapy treatment,” Friedman added.
In talks with the press, the senator has focused on his future beyond surgery. In a prepared statement issued by his office, Kennedy stated, “after completing treatment, I look forward to returning to the United States Senate and to doing everything I can to help elect Barack Obama as our next president.”