The Ulysses mission.
Bibcode: 1998SciAm.278a..52S
Smith, E. J.; Marsden, R. G.
Abstract
Of the dozens of spacecraft sent to explore the solar system, only Ulysses has veered far from the ecliptic. Now looping over the sun's poles in an orbit as wide as Jupiter's, Ulysses has a unique view of the solar wind that is advancing stellar astrophysics.
1998
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Scientific American
Ulysses
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