Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006eostr..87q.419z&link_type=abstract
Eos, Transactions American Geophysical Union, Volume 87, Issue 40, p. 419-419
Astronomy and Astrophysics
Astrophysics
Interplanetary Physics: Heliosphere/Interstellar Medium Interactions, Interplanetary Physics: Instruments And Techniques, Solar Physics, Astrophysics, And Astronomy: Transition Region
Scientific paper
Voyager 1, which left Earth in 1977 and is now about 10 billion miles away, has entered a region of space with strange anomalies, according to project scientist Ed Stone, former director of the Jet Propulsion Laboratory. The spacecraft has encountered magnetic potholes and bumps-areas where the magnetic field of the heliosheath either nearly vanishes or doubles, respectively. It also has encountered `anomalous cosmic rays' that are less energetic, and thus less dangerous, than galactic cosmic rays. In addition, the solar wind in the heliosheath has been slower than scientists had expected, only about 54,700 kilometers per hour compared with the predicted 322,000-483,000 kilometers per hour. Voyager 1 is expected to reach the edge of the heliosheath in about 10 years.
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