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.

Thursday, June 12, 2008

Stephen Harper, Canada’s Prime Minister, apologized on behalf of the Canadian Government for its role in the Indian Residential School System in front of Aboriginal Leaders, elders, and more than 1000 outside the Parliament Building. Harper proclaimed, “The treatment of children in Indian residential schools is a sad chapter in our history. Today, we recognize that this policy of assimilation was wrong, has caused great harm, and has no place in our country.” This apology was seen at more than 30 event around the country, and broadcast live on CBC Newsworld and CTV Newsnet.

The residential school system was created based on the Gradual Civilization Act (1857) and the Gradual Enfranchisement Act (1869), which assumed the superiority of British Ways, prompting the need for Aboriginals to become “civilized” by becoming English-speakers, Christians, and farmers. The funding of the schools was provided by the Indian Act (1876) and by the federal government department, Indian and Northern Affairs Canada, and operated with the support of churches, generally the Roman Catholic Church and the United Church of Canada.

In the 1920s, attendance became compulsory for all children aged 6 to 15, and families who refused to cooperate were at risk of having the children removed by the government, and the parents sent to prison. The school systematically tried to destroy the aboriginal language and way of life, raising the idea of cultural genocide. Students were forbidden to speak their native languages, even outside the classroom, as to install the English or French language (and as result, to “forget” their native language), punishable by unreasonably severe corporal punishment. Practicing non-Christian faiths was also punishable by corporal punishment.

In the late 1990s, allegations of sexual abuse, as well as several physical and psychological abuse, arose, leading to large monetary payments from the federal government and churches to former students. The government also established the Aboriginal Healing Foundation, providing $350 million to fund community-based healing projects, and provided another $40 million in 2005.

On February 13, 2008, Australian Prime Minister Kevin Rudd made a similar apology in the Australian House of Parliament.

On June 21, 2008, Indian Residential School Museum of Canada is scheduled to open on Long Plain First Nation, near Portage La Prairie, Manitoba.

Sunday, April 3, 200528 year old Alex Sanchez, outfielder for the Tampa Bay Devil Rays, is suspended without pay for 10 days for using a performance enhancing drug. Sanchez is the first player to be suspended under Major League Baseball’s new, stricter drug policy.

The Baseball officials and the players’ union have both decided to not disclose the specific substance which tested positive.

Sanchez originally planed an appeal against the ban, but decided against it. He denies taking any performance enhancing drugs and blames the positive test on over-the-counter vitamins, muscle relaxants and protein shakes that he takes, but has not identified any specific medications as of yet.

Monday, October 1, 2007

Jim Reeves is running for the Green Party of Ontario in the Ontario provincial election, in the York-Simcoe riding. Wikinews’ Nick Moreau interviewed him regarding his values, his experience, and his 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.

Tuesday, February 3, 2009

Sales of automobiles in the United States fell as much as 35% in January, compared to the same month a year ago, as manufacturers reported their January sales.

Ford Motor Company ^NYSE: F sales dropped 42% last month from the previous year. General Motors ^NYSE: GM reported a 49% decline. Chrysler was hardest hit among the domestically owned manufacturers with a plunge of 55%.

The decline in sales has not been limited to just US manufacturers. Japanese automaker Toyota ^NYSE: TM reported a 32% drop in US sales from a year earlier, Nissan Motors^{NASDAQ: NSANY} dropped 30%, and Honda ^NYSE: HMC sales dropped 28%.

Subaru and South Korean Hyundai Motor Company ^LSE: HYUD were two of the few auto firms that reported an increase in sales. They posted gains of eight and fourteen percent, respectively.

On an annual basis, sales overall have also been plummeting. Industry-wide US car sales dropped 18% last year to 13.2 million automobiles.

GM announced today that it will offer voluntary buyouts to 22,000 employees in the US, in an effort to reduce its expenditures.

Last month, GM and Chrysler were given loans worth US$17.4 billion from the government after they warned of imminent bankruptcy.

Monday, August 29, 2016

On Friday, French capital football club Paris Saint-Getmain announced they loaned Italian goalkeeper Salvatore Sirigu to Spanish club Sevilla F.C. till the season end.

29-year-old Sirigu started his career in Italy and joined the Parisians five years ago, in 2011. After playing 60 Serie A matches from 2009 to 2011, Sirigu became the first-choice goalkeeper at PSG for four years, playing 145 matches.

In five seasons at Parc des Princes, Sirigu has won four consecutive Ligue 1 titles, three Trophée des Champions, three Coupe de la Ligue, and two Coupe de France. Sirigu has played seventeen international matches, debuting in 2010.

Last season, German goalkeeper Kevin Trapp joined PSG and became their first-choice keeper. Lacking playing time with PSG, Sirigu signed the contract with Sevilla on Friday, after passing the medical tests hours before.

Per the agreement between the clubs, PSG has not included an option for Sevilla to buy the player.

Tuesday, April 14, 2020

In February 2017, the Iranian Chess Federation announced two teenage chess players, Dorsa Derakhshani and her younger brother Borna Derakhshani, were banned from representing the national team. The federation announced their decision although Dorsa Derakhshani had previously decided and informed the chess federation she did not wish to play for Iran.

Dorsa Derakhshani is currently 21 years old and holds the International Master (IM) as well as Woman Grand Master (WGM) titles. Her brother, Borna, plays for the English Federation and holds the FIDE Master title.

Dorsa Derakhshani was banned since she did not wear a hijab, an Islamic headscarf, while competing at the Tradewise Gibraltar Chess Festival in January 2017. Under the laws of Islamic Republic of Iran, hijab is a mandatory dress code. Her brother Borna Deraskhsani was banned for playing against Israeli Grand Master (GM) Alexander Huzman at the same tournament. Iran does not recognise the existence of Israel, and previously, Irani athletes have avoided playing against Israeli athletes.

Mehrdad Pahlavanzadeh, the president of the country’s chess federation, explained the decision to ban the players saying, “As a first step, these two will be denied entry to all tournaments taking place in Iran and in the name of Iran, they will no longer be allowed the opportunity to be present on the national team.” ^{((fa))Farsi language: ?????? ????? ?? ??? ??? ?? ??? ????? ?? ?? ???? ???????? ?? ?? ????? ? ?? ??? ????? ?????? ??????? ????? ??????? ? ???? ???? ???? ?? ??? ??? ?? ??????? ????.} He further stated, “Unfortunately, something that should not have happened has happened and our national interest is paramount and we have reported this position to the Ministry of Sports.” ^{((fa))Farsi language: ????????? ?????? ?? ????? ????????? ?????? ??? ? ????? ??? ?? ?? ?? ???? ?????? ???? ? ?? ??? ???? ?? ?? ????? ???? ?? ????? ?????.}

IM Dorsa Derakhshani, who currently studies at Saint Louis University in the United States and plays for the United States Chess Federation, discussed her chess career, time in Iran and the 2017 controversy, and her life in Saint Louis with a Wikinews correspondent.