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    Heliophysical: A broadening of the concept "geophysical," extending the connections from the Earth to the Sun & interplanetary space. On the 50th anniversary of the International Geophysical Year, the 2007 IHY activities will build on the success of IGY 1957 by continuing its legacy of system-wide studies of the extended heliophysical domain.


  • IHY Organization
    Who are your national and regional IHY leaders? Find information on IHY activities in your geographical region, and learn about IHY committees and organization.

  • Vision Statement
    A note explaining the vision for IHY and its rationale.

  • How IHY Works
    A brief description of our objectives, programs and activities and how they interrelate.

  • Science Goals
    A discussion of the primary objectives of IHY, the Science Goals, universal processes, and how different disciplines fit into IHY.

  • IHY Overview Publication
    A 50-page United Nations publication titled "Putting the 'I' in the IHY" is now available. This booklet is a comprehensive overview of the worldwide organization and current planning activities of IHY. Download PDF File (4.8 MB) Please contact Hans HAUBOLD if you would like to obtain the printed publication.

  • Frequently Asked Questions
    A list of frequently asked questions and their answers. If you have any questions please contact webmaster@ihy.gsfc.nasa.gov.

  • Downloads
    Documents, posters, presentations, brochures and more.


    IHY builds on the successes of the International Geophysical Year and the previous International Polar Years. We now extend our global studies out into the Heliosphere and incorporate the drivers of geophysical change into the global system. As we approach the "new frontier" of the heliopause and interstellar space, our heritage clearly extends back to previous International Years:

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    IHY Objectives:

    1. Develop the basic science of heliophysics through cross-disciplinary studies of universal processes.
    2. Determine the response of terrestrial and planetary magnetospheres and atmospheres to external drivers.
    3. Promote research on the Sun-heliosphere system outward to the local interstellar medium - the new frontier.
    4. Foster international scientific cooperation in the study of heliophysical phenomena now and in the future.
    5. Preserve the history and legacy of the IGY on its 50th Anniversary.
    6. Communicate unique IHY results to the scientific community and the general public.
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