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Science 4 March 2005:
Vol. 307. no. 5714, p. 1371
DOI: 10.1126/science.307.5714.1371d
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This Week in Science

Figure 2 Measurements of the direction of neutral hydrogen flow as it enters the inner heliosphere from the Solar and Heliospheric Observatory (SOHO) by Lallement et al. (p. 1447; see the Perspective by Jokipii) show that the heliosphere is distorted. The distortion is probably caused by the interstellar magnetic field, which forces the termination shock to be more elongated with increasing ecliptic latitude. Voyager 1, which is at about 90 astronomical units from Earth, has sent back controversial signals that suggest it may have left the heliosphere. However, if the heliosphere is distorted, as suggested by the SOHO data, then Voyager 1 is still trapped within the elongated region of the heliosphere and has not crossed the termination shock.

CREDIT: JOKIPII




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Science. ISSN 0036-8075 (print), 1095-9203 (online)