marathon06.org

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.

Sunday, June 25, 2006

United State president George W. Bush kicked off the 2006 Tee Ball on South Lawn season Friday, June 23, 2006. This is the sixth year of the White House Tee Ball Initiative.In attendance at the game were General Peter Pace, Chairman of the Joint Chiefs of Staff, who served as the Commissioner of the game, Tim Brant from ABC Sports and WJLA-TV acting as the play-by-play announcer, and seven-year old Zane Ellingwood, who founded “America’s Littlest Heroes” last year in his hometown of Cumberland, Maryland.

In his opening remarks, Bush welcomed parents and grandparents to a “historic ballpark.” Pitcher Mike O’Connor from the Washington Nationals was at the game as well.

Thursday, May 13, 2010

Wikinews reporter Iain Macdonald has performed an interview with Dr Isabella Margara, a London-based member of the Communist Party of Greece (KKE). In the interview Margara sets out the communist response to current events in Greece as well as discussing the viability of a communist economy for the nation. She also hit back at Petros Tzomakas, a member of another Greek far-left party which criticised KKE in a previous interview.

The interview comes amid tensions in cash-strapped Greece, where the government is introducing controversial austerity measures to try to ease the nation’s debt-problem. An international rescue package has been prepared by European Union member states and the International Monetary Fund – should Greece require a bailout; protests have been held against government attempts to manage the economic situation.

Tuesday, April 10, 2018

On Saturday, the Trump Tower, in Midtown, New York City, caught fire shortly before 18:00 EST (2200 UTC) on the 50th floor, claiming the life of a 67-year-old resident, Todd Brassner, who lived in apartment 50C. All other residents were evacuated without incident. During the fire, six firefighters received non-life-threatening burns and other minor injuries. Neither US President Donald Trump nor the First Family were in the building at the time of the fire.

The high-end Fifth Avenue address is the personal residence of President Donald Trump, whose family occupies the top three stories of the 58-story building. The US Secret Service maintains a constant security presence inside the building with the New York City Police Department guarding a hard perimeter, intended to stop vehicular attacks, and a soft perimeter, intended for on-foot attacks.

The four-alarm fire required 200 firemen, extra police, and paramedics. At 20:00 EST (0000 UTC Sunday), the New York City Fire Department (FDNY) declared the fire was under control. Trump tweeted, “Firemen (and women) did a great job. THANK YOU!” This is the second fire at Trump Tower since the election; previously on January 8, a fire was caused by an electrical malfunction in a cooling tower on the roof. Three FDNY firefighters received minor injuries, and all residents and office workers evacuated without incident on that occasion.

Trump Tower provides a number of unique problems never before encountered by the Secret Service. Never has a US President’s personal residence been inside a skyscraper or in a densely populated area like Midtown. The security measures have disrupted vehicular and pedestrian traffic requiring time consuming detours and delaying emergency response.

The New York Fire Code did not mandate sprinkler systems at the time Trump Tower was built in 1983, which might have reduced the size and severity of the fire had they been present. The 50th-floor apartment was, according to FDNY Fire Commissioner Daniel Nigro, “[T]he apartment was virtually, entirely on fire.” The Secret Service monitors all the fire alarms in the building but it took time to find the source of the thick black smoke emanating from the fire. Secret Service Agents escorted the firefighters throughout the building, including the Trump residence.

Brassner, the sole casualty, was unconscious when firefighters pulled him out of apartment 50C. He was transported to Mount Sinai Roosevelt Hospital. Originally listed as critical, he was pronounced dead sometime during the night. Brassner, guitar collector, was acquainted with artist Andy Warhol and was acknowledged in Warhol’s 1989 autobiography, The Andy Warhol Diaries. The cause of the fire is unknown, with investigations into Brassner’s death and the emergency response ongoing. Currently, the Secret Service leads the investigation.

Thursday, May 13, 2010

Wikinews reporter Iain Macdonald has performed an interview with Dr Isabella Margara, a London-based member of the Communist Party of Greece (KKE). In the interview Margara sets out the communist response to current events in Greece as well as discussing the viability of a communist economy for the nation. She also hit back at Petros Tzomakas, a member of another Greek far-left party which criticised KKE in a previous interview.

The interview comes amid tensions in cash-strapped Greece, where the government is introducing controversial austerity measures to try to ease the nation’s debt-problem. An international rescue package has been prepared by European Union member states and the International Monetary Fund – should Greece require a bailout; protests have been held against government attempts to manage the economic situation.

Saturday, September 10, 2005

The city of San Jose, California greeted the opening of the Guadalupe River Park and Gardens today with festivities, music, and dancing. Local organizations and businesses offered booths and activities for the crowd.

Themed “A park for many reasons, a park for all seasons”, the opening marked the culmination of 12 years of building, at a cost of $340 million. With trails running 2.6 miles along the Guadalupe River, the park offers an open space for city residents, preserves habitat for local wildlife, and works in conjunction with local flood control projects.

Planning for the park began in 1985 and construction continues to extend the trails along the lower Guadalupe River to Alviso by 2006.