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.
This is an artist's impression of how Rosetta will look when it releases its lander which will land on a comet nucleus.
Click on image for full size
Courtesy of European Space Agency

Rosetta Mission Update
News story originally written on January 21, 2003

The Rosetta Mission, the first mission to have a lander which will touch down on a comet, was suppose to launch in January 2003. Unfortunately, launch has been delayed and no new launch date has been set.

The Rosetta spacecraft was to be launched aboard an Ariane 5 rocket. Just a month before Rosetta's projected launch date, another Ariane 5 rocket self-destructed because it had veered so far off course! It is a bitter blow, but the European Space Agency, which is managing the Rosetta mission, chose to delay the mission until a suitable rocket is tested and is proven safe.

Rosetta missed its launch window. This means it cannot rendezvous with comet Wirtanen as was planned. However, the ESA is in the process of finding other suitable comets that Rosetta might meet with and land on! The Rosetta spacecraft is actually made of two parts: an orbiter, which will approach the chosen comet and then circle it, and a lander, which will touch down on the comet.

Rosetta is certainly taking a new direction than was first planned. Rosetta's Project Scientist, Gerhard Schwehm, speaks on behalf of all of those involved with Rosetta. He said, "During the decade it has taken us to develop and build Rosetta, we have faced many challenges and overcome them all. This new challenge will be met with the same energy, enthusiasm and, ultimately, success." Given time, Rosetta will still study a given comet in detail, in hopes that this will lead to new scientific findings about all comets and thus about the formation of our solar system.

Last modified November 10, 2003 by Jennifer Bergman.

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