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 diagram shows a simulated view of the black disk of Venus against the backdrop of the Sun during the Venus transit of June 2004. The yellow arrows show the path of Venus across the face of the Sun throughout the course of the transit.
This illustration is original Windows to the Universe artwork created by Randy Russell. The image of the Sun is courtesy SOHO (ESA & NASA); information on the apparent size and path of Venus courtesy Fred Espenak, NASA's GSFC.

Venus Transit in June 2004
News story originally written on June 2, 2004

A rare astronomical event will occur in early June 2004. For the first time since 1882, Earthlings will be able to view a transit of the planet Venus. "Transit" is a term used by astronomers when a planet passes directly between Earth and the Sun. A transit is somewhat similar to a total solar eclipse, when the Moon passes between Earth and the Sun.

This Venus transit will occur on June 8, 2004. There will be another transit of Venus in 2012. If you miss that one you will have to wait more than a century for the next opportunity!

During the transit, observers will see a small black dot slowly creep across the face of the Sun. The dot, Venus, will take about six hours to complete the transit. Remember, it is never safe to directly view the Sun. For tips on how to safely view the transit and what can be seen from where you live, check out this NASA web site.

Last modified May 28, 2004 by Randy Russell.

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Warnings: The True Story of How Science Tamed the Weather by Mike Smith tells the story of our storm warning system. See our online store book collection.

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF