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.
Titan's atmosphere is orange. We cannot see the surface of Titan because of the thick atmosphere.
Click on image for full size
Image courtesy NASA/JPL/Space Science Institute.

Titan

Titan is the largest moon of the planet Saturn. Titan is the second largest moon in our Solar System. The diameter of Titan is 5,150 km (3,200 miles), which is about the distance across the United States. Jupiter's moon Ganymede is the only moon in our Solar System that is larger than Titan. Titan is larger than the planets Mercury and Pluto!

Titan is the only moon in the Solar System that has a thick atmosphere. Titan's atmosphere is even thicker than Earth's! We can't see through Titan's atmosphere to get a clear view of the moon's surface. Thanks to the Huygens lander and to radar on the Cassini spacecraft we are beginning to get some good looks at the surface of Titan. Scientists have discovered lakes of liquid methane and ethane near Titan's poles. They have also spotted clouds in the atmosphere of Titan.

Titan was discovered by Christiaan Huygens in 1655. It orbits Saturn at a distance of 1,221,830 km (759,208 miles). Titan is very cold (-178º C, or -288º F, at the surface), and is mostly made of ice. The moon has an unusual history, and some scientists believe there is a very tiny chance that life might exist on Titan!


Last modified January 22, 2009 by Randy Russell.

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