NASA’s STEREO-A spacecraft will travel between the Sun and Earth this Saturday, August 12. This first visit to the Earth presents a unique opportunity to learn more about our nearest star.
STEREO-A will achieve such 3D viewing by combining its observations with those of NASA's Solar and Heliospheric Observatory and NASA's Solar Dynamics Observatory .
“In this phase of the solar cycle, STEREO-A is going to experience a fundamentally different Sun. There is so much knowledge to be gained from that,” said Lika Guhathakurta, STEREO program scientist at NASA Headquarters in Washington, D.C. “There is a recent idea that coronal loops might just be optical illusions,” said Terry Kucera, STEREO project scientist at NASA’s Goddard Space Flight Center in Greenbelt, Maryland.
On February 6, 2011, the duo achieved a landmark milestone when the "STEREO-A and -B reached a 180-degree separation in their orbits." The observations provided the first comprehensive image of the Sun as a full sphere.
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