COSMIC RAY MYSTERY SOLVED
-------------------------

When Voyager 1 finally crossed the "termination shock" at the edge of
interstellar space in December 2004, space physicists anticipated the
long-sought discovery of the source of anomalous cosmic rays. These cosmic
rays, among the most energetic particle radiation in the solar system, are
thought to be produced at the termination shock - the boundary at the edge
of the solar system where the million-mile-per-hour solar wind abruptly
slows. A mystery unfolded instead when Voyager data showed 20 years of
predictions to be wrong.

...

The paper, "An Explanation of the Voyager Paradox: Particle Acceleration at a
Blunt Termination Shock," is available in the February 17 issue of the Geophysical
Research Letters.

http://spaceflightnow.com/news/n0602/19voyager/