The Solar Dynamics Observatory, or SDO ... SDO has its roots in the earlier Solar and Heliospheric Observer, or SOHO, the wildly successful ESA solar mission. Launched in 1995, SOHO is stationed ...

Observed by NASA and ESA’s Solar and Heliospheric Observatory (SOHO), the comet’s tail extended dramatically as it encountered intense solar winds, providing a unique opportunity to study the ...

The Thirteen Towers of Chankillo. (David Edgar/Wikipedia/CC BY-SA 3.0) The ancient civilization that designed the solar observatory is hardly known, but it would have been one of the oldest ...