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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.
John Lemke

Voyager 1 spots new region at the edge of the Solar System | Ars Technica - 0 views

  • The researchers suspect they've reached a region of the solar-interstellar boundary that nobody had predicted. In this area, the magnetic field lines of the Sun link up with those of the interstellar field. Scientists are calling this linkage a "highway" for particles to travel along. It lets solar wind particles escape more readily, causing the drop in their intensity. And it opens the door for low-energy cosmic rays to slip in to our Solar System, which is why Voyager 1 is seeing so many of them. According the researchers at the press conference that announced these results, most steady-state models of the Solar System failed to predict anything like this. A few models did have a feature like this, but it was only a transient one that appeared at certain times of the solar cycle.
John Lemke

Japanese company proposes to build solar power cells on the Moon to provide clean energ... - 0 views

  • the 11,000 mile Lunar equator
  • will beam microwave and laser energy to giant energy conversion facilities on Earth. These beams will travel to semiconductors and inverters which will convert that energy to clean electricity to the grid that will power households, businesses and factories.
  • Shimizu’s plan uses Earthly materials, ceramics, water, glass, concrete, oxygen and solar cells. They would not ship water from Earth, they will make user of the Moon’s own resources and reduce the lunar soil using hydrogen shipped from our planet and then extract the water for use in construction.
John Lemke

Video: Sun has 'flipped upside down' as new magnetic cycle begins - Science - News - Th... - 0 views

  • The sun has "flipped upside down", with its north and south poles reversed to reach the midpoint of Solar Cycle 24, Nasa has said. Now, the magnetic fields will once again started moving in opposite directions to begin the completion of the 22 year long process which will culminate in the poles switching once again."A reversal of the sun's magnetic field is, literally, a big event," said Nasa’s Dr. Tony Phillips."The domain of the sun's magnetic influence (also known as the 'heliosphere') extends billions of kilometers beyond Pluto. Changes to the field's polarity ripple all the way out to the Voyager probes, on the doorstep of interstellar space."
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    It is topics like these that Lumpy and Brian often discuss on Tech Net News and Opinion which airs Monday's from 8-10 PM EST. Feel free to join us in geekshed.net IRC in #indienation. We encourage listener participation and having listeners on the air.
John Lemke

Chinese rover may freeze to death on the moon | The Verge - 0 views

  • Observers say the equipment failure may have disabled the electrical motors needed to close the rover's solar panels, which would have disastrous effects as the rover heads into the two-week "lunar night." If the panels cannot be closed, the rover will almost certainly freeze during the two week span.
John Lemke

Hubble spots water spurting from Europa : Nature News & Comment - 0 views

  • “If this pans out, it’s potentially the biggest news in the outer Solar System since the discovery of the Enceladus plume,” says Robert Pappalardo, a planetary scientist at the Jet Propulsion Laboratory in Pasadena, California, who was not involved in the research.
  • Roth’s team spotted the plumes when Europa was at its greatest distance from Jupiter. Changing stresses in the moon's crust, caused by tidal forces between the moon and planet, may explain why the researchers didn't see any plumes in the November observation when Europa and Jupiter were close. “Maybe Europa is just burping once in a while,” Pappalardo says.
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.
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