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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.

Tuesday, April 5, 2005Terry Vo, the 10-year old Australian boy who had two hands and a foot reattached by surgeons after losing them in an accident, has had to have the foot re-amputated. He will be given a prosthetic foot in its place.

The operation to re-attach three limbs was thought to have been a first – but was ultimately unsuccessful, with the foot having died inside, and receiving insufficient blood supply following the surgery to reattach it.

“That would lead to the small muscles in the foot actually constricting, the toes bending over and a deformed …. foot that is sort of clawed over and doesn’t have good sensation,” said plastic surgeon, Mr Robert Love today, on Australia’s ABC Radio.

“Even if you can get all of that to survive, he [would be] worse off than having had an amputation.”

“What is very disappointing is that for the first two days after [the operation] the foot looked absolutely magnificent,” he said.

Terry’s hands were healing well, said the surgeon. The prosthetic foot would allow him to walk normally, since his knee was intact.

Sunday, January 27, 2008

Viktor Schreckengost, the father of industrial design and creator of the Jazz Bowl, an iconic piece of Jazz Age art designed for Eleanor Roosevelt during his association with Cowan Pottery died yesterday. He was 101.

Schreckengost was born on June 26, 1906 in Sebring, Ohio, United States.

Schreckengost’s peers included the far more famous designers Raymond Loewy and Norman Bel Geddes.

In 2000, the Cleveland Museum of Art curated the first ever retrospective of Schreckengost’s work. Stunning in scope, the exhibition included sculpture, pottery, dinnerware, drawings, and paintings.

Thursday, September 13, 2007

Having worked as an aide, advisor, and Executive Assistant to municipal and provincial politicians, Sheila White is running for the Ontario New Democratic Party in the Ontario provincial election, in the Scarborough-Rouge River riding. Wikinews’ Nick Moreau interviewed her regarding her values, her experience, and her campaign.

Stay tuned for further interviews; every candidate from every party is eligible, and will be contacted. Expect interviews from Liberals, Progressive Conservatives, New Democratic Party members, Ontario Greens, as well as members from the Family Coalition, Freedom, Communist, Libertarian, and Confederation of Regions parties, as well as independents.

Wednesday, April 23, 2008

Catherine McGuigan, a resident in South Mimms, Hertfordshire, UK, found skeletons from over a century ago buried under her dining room.

She had hired builders for an extension for her cottage, where she has lived for eleven years, and at the beginning of April they found human bones in the ground.

Her cottage was built over a burial ground; from 1697 to 1820 the land was owned by the Religious Society of Friends. In the 1600s, members of the society, better known as Quakers, were persecuted for their beliefs and so were not allowed to be buried in consecrated church grounds. Instead burials, which were also sometimes for others not recognised as parishioners – such as homeless people, often took place in the countryside.

The Daily Mail states in its April article that the Religious Society of Friends have advised McGuigan that she “must cremate” the bodies, however Quakers have written an open letter to the Daily Mail, informing that for Quakers, there is “no specific advice on the disposal of bodies”, and that they had never expressed an opinion on how the discovered skeletons should be buried.

The cremation was rumoured to cost up to £32,000 – an £800 quote for cremation of a single body multiplied by 40, however as yet only ten bodies have been discovered.

The builders originally thought the bones were pieces of pipe, and McGuigan has now ordered coffins and is looking to holding a mass cremation or a burial in a nearby field.

Friday, June 13, 2008

British drivers have been urged not to panic buy fuel because of the 4-day walkout by delivery drivers working for companies delivering to Shell petrol stations. The 600 workers have walked out over pay disagreements, wanting an increase to their current pay of £36,500, however their union Unite turned down a last-minute offer of £41,500.

Hoyer UK, which employs tanker drivers for Shell, said, “We extended our offer to the very limits that our business could sustain.” However Unite said in a press release that, “this dispute could have been resolved if Shell had advanced a fraction of the billions of pounds in profit they make every month”, continuing to say, “one of the world’s richest companies is prepared to play Pontius Pilate and see the British public inconvenienced rather than settle this dispute for a sum smaller than the chairman’s pay increase last year”

Shell admitted that the walkout could leave some of its 1,000 forecourts without fuel, but the UK Petrol Industry Association, which represent oil refiners, said that forecourts would have around 4 days of supply, maintaining usual stocking levels. Shell also commented that the strike impact would be “significant”, as the company runs around 1 in 10 of all petrol stations in the UK.

British Business Secretary, John Hutton, said that “the strike, which will have a disproportionate effect on people in Britain, cannot be justified,” and urged both sides to resume negotiations in order to settle the dispute. “We have been working closely with industry to put in place detailed contingency plans to reduce as far as possible the disruption for the driving public,” he added. Unite’s press release also confirms that “provision has been made for fire, police and the emergency services.”

Tanker drivers on strike have set up picket lines at many of Shell’s UK refineries, including those in Stanlow, Avonmouth, Plymouth, Pembroke, Cardiff, Kingsbury, Basildon, Grangemouth, Aberdeen, Inverness, Jarrow and Luton Airport.

Friday, January 19, 2007

In the United States, a stabbing at the Lincoln-Sudbury Regional High School in Sudbury, Massachusetts has left a 15-year old student dead.

The stabbing happened around 7:20 am EST, before classes had started. A fight broke out in a boys’ bathroom between the 15-year old victim, James Alenson and 16-year-old suspect John Odgren, the fight spilled out in the hallway, where the stabbing occurred.

The school was sent into a “lockdown” and students were ushered into the gym, cafeteria and various classrooms. Alenson was rushed to Emerson Hospital where he was pronounced dead at 8:15 am EST. Odgren admitted to the stabbing and was in the principal’s office saying “I did it, I did it,” to police. However, Odgren also reportedly said “Is he OK? I don’t want him to die,” according to a police report.All students were released at 10:20 am EST.

Odgren was diagnosed with severe Asperger’s syndrome, an autistic spectrum disorder has been on medication for years, was a special education student at the school and had no history of violence according to his lawyer, Jonathan Shapiro. He is being charged with “murder, assault and battery with a dangerous weapon, and carrying a knife onto school property” and was arraigned in Framingham District Court where he pleaded not guilty to the charges.

Shapiro also asked if his client could go to secure facility at Children’s Hospital in Boston. Judge Paul Healy denied the request saying he did not have “enough assurance that Children’s Hospital would be secure.” Instead, he will be held at Middlesex Jail in Cambridge outside of the general population.

According to the school’s website, there will be a community meeting tonight in the school’s auditorium at 7pm EST.

Monday, June 18, 2007

Police in Melbourne, Australia are on the hunt for a gunman who killed a man and injured two others in the city’s central business district this morning.

Officials warned all office workers to remain indoors, and train services to Flinders Street Station were temporarily on hold, as investigations were carried out on the intersection of Flinders Lane and William Street.

Malcom Bates, who witnessed the shootings at around 8:15 a.m., said the gunman grabbed a woman from inside a taxi. “The lady got away and he turned and shot three people basically point blank,” Mr Bates said. “I was right across the road”. He said that the incident took no longer than the “wink of an eye”.

Paramedics struggled to revive the one victim for almost an hour before declaring him dead at the scene. The two injured people have been taken to the Royal Melbourne Hospital in a critical condition.

Police believe the incident began at the Bar Code 24-hour bar in King Street, when a woman attempted to get into a taxi. She was apparently grabbed by the hair by the gunman who then shot her and two men who attempted to come to her aid.

Police have identified the gunman as Christopher Wayne Hudson, aged 29. They believe him to be a member of the Hells Angels bikie gang. Police have described Hudson as about 180 cm tall, with short brown hair and wearing a dark tracksuit top and dark denim jeans.

A building worker on a construction site on the corner of Queen and Flinders Streets has reportedly discovered a handgun. It is understood the gunman may have thrown the weapon into the site as he fled the scene.