• January 5, 2006

    Episode 17: SOHO 10-Year Anniversary

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    It's difficult to study our closest star, the Sun. Its brilliance blinds as well as illuminates. Fortunately, for the past decade, we've had Solar and Heliospheric Observatory, or SOHO, monitoring the Sun on a daily basis. SOHO, which celebrated its 10th anniversary in December, studies the Sun's internal structure and far-reaching outer atmosphere, and the stream of gases called the solar wind. Its observations help us better understand the interactions between the Sun and the Earth's environment. SOHO is a joint project of the European Space Agency and NASA. It was built in Europe with instruments provided by European and American scientists.