In 1990, NASA and the European Space Agency launched the Ulysses probe to make the first observations of its polar regions.

1990年，NASA和欧洲空间局发射了尤利西斯号探测器，对太阳极地区域做了首次观察。

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But analysis of the motion of Ulysses, another space probe, has shown that it, too, is affected by the mysterious acceleration.

ECONOMIST: A space oddity