HENNING DALHOFF / SCIENCE PHOTO LIBRARY HENNING DALHOFF / SCIENCE PHOTO LIBRARY
SOHO and the Sun. Computer illustration of the Solar and Heliospheric Observatory (SOHO, upper right) and several solar phenomena it studies. SOHO was launched on 2nd December 1995 by the European Space Agency (ESA) for the International Solar Terrestrial Physics (ISTP) program. The solar features seen here include the Sun's magnetic field (blue, top right), electromagnetic radiation (spectrum, top centre), sunspots (dark, lower centre), the solar wind (arrows, lower left) and solar flares (bottom left). SOHO monitors solar activity continuously, as periods of high activity can have adverse effects on Earth.
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