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Ulysses Cracks a Cosmic Peanut

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Science  10 Nov 1995:
Vol. 270, Issue 5238, pp. 912
DOI: 10.1126/science.270.5238.912

Summary

Chicagod—New results from the U.S.-European solar satellite, Ulysses, have indicated that the heliosphere—a region carved out of the thin gases of interstellar space by the wind of charged particles streaming from the sun—is not spherical, as physicists have generally pictured it. Instead, it is shaped more like a peanut, with its “waist” in the same plane as the solar system.