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John Lemke

Colliding Atmospheres: Mars vs Comet Siding Spring - NASA Science - 0 views

  • "We hope to witness two atmospheres colliding," explains David Brain of the University of Colorado's Laboratory for Atmospheric and Space Physics (LASP).  "This is a once in a lifetime event!"
  • Everyone knows that planets have atmospheres.  Lesser known is that comets do, too.  The atmosphere of a comet, called its "coma," is made of gas and dust that spew out of the sun-warmed nucleus.  The atmosphere of a typical comet is wider than Jupiter.
  • The timing could scarcely be better.  Just last year, NASA launched a spacecraft named MAVEN to study the upper atmosphere of Mars, and it will be arriving in Sept. 2014 barely a month before the comet. MAVEN is on a mission to solve a longstanding mystery: What happened to the atmosphere of Mars?  Billions of years ago, Mars had a substantial atmosphere that blanketed the planet, keeping Mars warm and sustaining liquid water on its surface. Today, only a wispy shroud of CO2 remains, and the planet below is colder and dryer than any desert on Earth. Theories for this planetary catastrophe center on erosion of the atmosphere by solar wind.
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  • the comet could spark Martian auroras.
John Lemke

Foxconn worker riot closes factory | Ars Technica - 0 views

  • Early Monday morning, Foxconn released a statement indicating that the riot started as a personal disagreement between factory workers in a dormitory and was eventually brought under control by police, but this clashes with reports trickling in from users of China's version of Twitter, Sina Weibo. Much like with the situations in Egypt and other Arab Spring countries earlier this year, microbloggers are painting a different picture than the one presented by official sources; numerous Weibo posts indicate that the riots were started not by a fight between workers in off-campus housing, but instead by security guards beating one or more workers nearly to death. Regardless of the cause, pictures leaking out from the scene show some destruction, including broken windows and a toppled guard post building.
John Lemke

Mars Orbiter Mission looks to sniff methane on comet - The Times of India - 0 views

  • BANGALORE: India's Mars Orbiter Mission (MOM) will look to have a date with the Siding Spring comet, which will pass very close to the Red Planet on October 19, Isro chairman K Radhakrishnan said on Thursday.
  • Asked how Nasa could do reprogramming on its MAVEN spacecraft to study the comet, Radhakrishnan said: "MAVEN reached there before us and has completed the orbit around the Red Planet. I have received mails about what they are going to do, and we know what we should. But MOM has to ascertain its position. It will be known in 2-3 days."
John Lemke

World's Largest Solar Array Set to Crank Out 290 Megawatts of Sunshine Power - Scientif... - 0 views

  • Agua Caliente, the largest photovoltaic solar power facility in the world, was completed last week in Arizona.
  • ive million solar panels that span the equivalent of two Central Parks in the desert between Yuma and Phoenix. It generates 290 megawatts of power—enough electricity to fuel 230,000 homes in neighboring California at peak capacity.
  • The project, which cost a total of $1.8 billion to construct, received a million-dollar loan from the Loan Programs Office. Under its “SunShot” initiative (so-named in the spirit of president John F. Kennedy’s “moon shot” program), the DoE provides guaranteed loans to unproved ventures in solar power in the hopes of promoting innovation and making the technology more cost-effective.* Although Agua Caliente (owned by U.S. energy giant NRG Energy and partner MidAmerican Solar) is now the largest photovoltaic solar facility in the world, it probably will not hold that distinction for long. Other massive solar panel facilities, such as Antelope Valley Solar Ranch One in California’s Mojave Desert, are rapidly springing up across the Southwest.
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  • The energy contained in just one hour of sunlight could power the world for a year, if only it could be harnessed.
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