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Physics and Astronomy Calendar

Thursday, September 20th 2007
12:00 pm:
Speaker: Dr. Randy Jokipii, University of Arizona
Subject: Implications of Recent Remote and In Situ Observations of the Outer Heliosphere and the Local Interstellar Medium

Recent in situ observations from the Voyager spacecraft and remote observations from SOHO have both increased our understanding of the interaction of the solar wind with the interstellar medium and provided new information about the very local interstellar medium. Voyage data have revealed a very dynamic, blunt solar-wind terminations shock. The combination of Voyager and remote sensing observations of neutral atoms from the SOHO spacecraft have provided the first measurements of the very local interstellar magnetic field. The direction of this local field is quite different from previous measurements which averaged over parsec scales. The implications of these data will be discussed.

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