March 5, 2010: STEREO (Ahead) watched as a strong coronal mass ejection (CME) and an eruptive prominence rose up and stretched way out above the Sun’s surface (Feb. 28, 2010). The composite image and movie show the action in both extreme UV wavelength (orange Sun) near and just above the solar surface overlaid on the frames from STEREO COR1 coronagraph that shows the material as it rises out into the corona. The video clip shows about 8 hours of activity. This is one of the brightest and most substantial CMEs we have seen in several years. And the presence of such bright prominence material in COR1 is very rare and has only been seen twice before.

About the SOHO Mission

SOHO, the Solar & Heliospheric Observatory, is a project of international collaboration between ESA and NASA to study the Sun from its deep core to the outer corona and the solar wind.
SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team led by prime contractor Matra Marconi Space (now EADS Astrium) under overall management by ESA. The twelve instruments on board SOHO were provided by European and American scientists. Nine of the international instrument consortia are led by European Principal Investigators (PI’s), three by PI’s from the US. Large engineering teams and more than 200 co-investigators from many institutions supported the PI’s in the development of the instruments and in the preparation of their operations and data analysis. NASA was responsible for the launch and is now responsible for mission operations. Large radio dishes around the world which form NASA’s Deep Space Network are used for data downlink and commanding. Mission control is based at Goddard Space Flight Center in Maryland.

To learn more about SOHO go to:

October 11, 2011

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