Current Events

  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.
  • Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows
    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 ...Read more

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    Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows

    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 degrees hotter than in a previous experiment run 20 years ago. These measurements confirm geophysical models that the temperature difference between the solid core and the mantle above, must be at least 1500 degrees to explain why the Earth has a magnetic field. For more information about this study, see the press release from the European Synchrotron Radiation Facility.
  • Ocean Volcanic Rocks Contain Samples of Recycled Crust
    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials fr...Read more

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    Ocean Volcanic Rocks Contain Samples of Recycled Crust

    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth’s crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie’s Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature. Oceanic crust sinks into the Earth’s mantle at so-called subduction zones, where two plates come together. Much of what happens to the crust during this journey is unknown. Model-dependent studies for how long subducted material can exist in the mantle are uncertain and evidence of very old crust returning to Earth’s surface via upwellings of magma has not been found until now. For more information about these results, see the press release from the Carnegie Institution.

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Andy Steere

September's Total Eclipse of the Moon
News story originally written on September 25, 1996

On the night of September 26-27, almost everyone in the Americas and Western Europe will have a perfect chance to view total lunar eclipse (assuming the skies are clear).

The lunar eclipse will start on September 27th at 12:12:29 am Greenwich Mean Time (GMT) when the moon will start to show very faint shading. Note that for observers in the Americas, because of the time difference, the lunar eclipse will actually start on September 26th instead of September 27th. The moon will enter into total eclipse about two hours later (2:19:20 a.m. GMT September 27th or 10:19 pm EDT on September 26th) when the Earth's shadow will completely cover the Moon. The moon will not be completely dark, however, because of the reflected light from the Earth's atmosphere. The total eclipse will last about 70 minutes ending at 3:29:30 a.m. GMT (September 27) and the moon will reappear.

For sky watchers in North American eastern time zone, the lunar eclipse will begin at 8:12 pm EDT (September 26) and end at 1:36 am EDT (September 27). The total lunar eclipse will commence at 10:19 pm EDT (September 26) and end at 11:29 pm EDT (September 26).


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