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The Solar and Heliospheric Observatory
The SOHO mission is a part of NASA's Goddard Space Flight Center.
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European Space Agency
Learn more about NASA's involvement with ESA.
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Artist concept of space weather showing an active Sun with flares and a CME in the upper right, the Earth in the lower right with types of technology affected by space weather to the lower left; satellites, airplanes, the ISS and ground-based electrical lines.
Heliophysics

Studying the Sun-Earth connection.

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Latest News

More Eruptions from Active Region 1476

The sun erupted with a coronal mass ejection traveling at over 900 miles per second.
05.17.12

The sun erupted with an M-class flare that peaked at 9:47 PM EDT on May 17, 2012. A CME also burst from the sun at 9:48 PM EDT, traveling at over 930 miles per second.

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Hinode/SOHO Paint Asymmetrical Picture Of the Sun

In 2008 in the northern hemisphere of the sun (left) Hinode observed large patches of negative polarity, shown in orange. In 2011 (right), the same area showed much smaller patches and a more even distribution of negative and positive (blue) regions.
04.20.12

The solar cycle unfolds with seeming regularity every 11 years -- magnetic north and south pole flip -- now two upcoming papers show that the switch at bottom and top of the sun is not simultaneous.

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Moderate Geomagnetic Storm at Earth

This bright area is sunspot region 1429 which has released M and X class flares all week.
03.12.12

Geomagnetic storms at Earth are currently at a rating of G2 (moderate) on a scale of G1 to G5.

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SOHO Mission

    The Solar & Heliospheric Observatory (SOHO) project is a cooperative effort between the European Space Agency (ESA) and NASA. SOHO was designed to study the internal structure of the Sun, its extensive outer atmosphere and the origin of the solar wind, the stream of highly ionized gas that blows continuously outward through the Solar System.

    SOHO was launched on December 2, 1995. The SOHO spacecraft was built in Europe by an industry team led by Matra, and instruments were provided by European and American scientists. 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 to track the spacecraft beyond the Earth's orbit. Mission control is based at Goddard Space Flight Center in Maryland.

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