NASA’s Solar Terrestrial Relations Observatory witnessed a dramatic solar eruption on Aug. 24, 2014 — even with one of its “eyes” partially closed.
This imagery of a coronal mass ejection, a giant explosion of solar material that explodes out into space, was captured by one of STEREO’s two spacecraft, STEREO-B, which currently has a view of the far side of the sun.
The second spacecraft, STEREO-A, however, is in a temporary phase of recording only low-resolution data. Due to an orbit that has moved it toward the other side of the sun from Earth, STEREO-A adjusted its dish-shaped antenna on Aug. 20 to point slightly away from the bright heat of the star, and consequently to a position that isn’t pointed directly at Earth. The signal still comes to Earth but is fainter, so the spacecraft will be sharing only low-resolution data until it reemerges on the other side of the sun in early 2016.
The twin STEREO spacecraft provide views of the sun from a different angle than can be seen from Earth’s perspective. When combined with images from near-Earth spacecraft like the European Space Agency and NASA’s Solar and Heliospheric Observatory, it helps scientists understand the three-dimensional shape of the sun’s brilliant CME eruptions.Source: Karen C. Fox
NASA’s Goddard Space Flight Center, Greenbelt, Maryland