Instruments for a Revolution
Three pioneering spacecraft, the SOlar and Heliospheric Observatory, or SOHO for short, Ulysses and Yohkoh, have discovered clues to a variety of enigmatic problems in our understanding of the Sun. They have transformed human perception of the star on which our lives depend, examining it with exquisitely sensitive and precise instruments and perceiving worlds that are otherwise invisible. Major new instruments aboard these spacecraft have traced the flow of energy and matter from down inside our star to the Earth and beyond, providing insights that are vastly more focused and detailed than those of previous solar missions. When combined with ground-based observations, and with each other, the SOHO, Ulysses and Yohkoh spacecraft have created a renaissance in solar science.
KeywordsSolar Wind Coronal Hole European Space Agency Solar Wind Speed Ulysses Spacecraft
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