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    SOHO's 20th Birthday

    SOHO was launched on 2 December 1995, for what was originally planned as a two-year mission. Twenty years later, it's still going strong.



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    SOHO featured in the APOD

    SOHO is featured in the Astronomy Picture of the Day.



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    Solar pick: Soho comet contest winners

    We are pleased to announce the winner and runner-ups in our SOHO 3000th comet contest. The entries had to guess the time and date of perihelion (closest approach to the Sun) of our 3000th comet...
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    Hotshot: Soho's 3000th comet

    On Sept. 13, 2015, the Solar and Heliospheric Observatory -- a joint project of the European Space Agency and NASA -- discovered its 3,000th comet, cementing its standing as the greatest comet finder...
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    Solar pick: Here comes the sun

    The Solar and Heliospheric Observatory (SOHO) has been watching the Sun for almost 20 years. In that time it has seen solar activity ramp up and...



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    Solar pick: Bright filament eruption

    An elongated solar filament that extended almost half the Sun's visible hemisphere erupted into space (Apr. 28-29, 2015) in a large burst of bright plasma.



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  7. Solar pick: Source of st. Patrick's day aurora

    Most of the energy that generated the most powerful geomagnetic storm of this solar cycle on March 17-18, 2015 came from this fast-moving, Earth-directed coronal mass ejection (CME)



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    Pick of the week: Total solar eclipse 2015

    On March 20, 2015 a solar eclipse raced across the northern Atlantic between Ireland and Iceland before hitting land...



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    SOHO HOTSHOT: SOHO's 3000th Comet Contest

    SOHO is approaching the date when its images will reveal its 3000th comet, a record-extending achievement. So we are offering everyone an opportunity to guess when this will happen...



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    PICK OF THE WEEK: SOHO Comet 2875

    An unusual comet is skirting past the Sun (Feb.18-20, 2015). "It's a 'non-group comet,' meaning that it does not appear to be related to any other comet or comet family that we have on record,"...
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    Pick of the week: Far-side halo outburst

    The Sun blew out a powerful coronal mass ejection (CME) from just around the edge of the Sun...



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  12. Pick of the week: Earth-directed x-class flare and cme

    An active region just about squarely facing Earth erupted with an X 1.6 flare (largest class) as well as a coronal mass ejection (CME)...



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    Pick of the week: Proton storm surge

    A far-side powerful flare erupted and triggered a huge and long-lasting proton storm that flew...



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    Pick of the week: Magnificent blast

    STEREO (Behind) captured this magnificent coronal mass ejection (associated with an M-class flare) that flung a long stream of plasma...



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    PICK OF THE WEEK: Planets in Conjunction

    At their closest approach, these two bright planets, Mercury and Jupiter, were less than



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    PICK OF THE WEEK: Seeing Double

    The Sun unleashed two bursts of plasma over a two-day period...



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    PICK OF THE WEEK: Comet Jacques

    STEREO has observed the recently discovered Comet Jacques as it passed by its nearest approach to the Sun



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    PICK OF THE WEEK: Sequential Bursts

    A single active region on the Sun ejected at least half a dozen bursts of plasma...



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    PICK OF THE WEEK: Seeing Double

    The Sun unleashed two bursts of plasma over a two-day period...



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    PICK OF THE WEEK: Five Days/Eight CMEs

    The dynamism of the Sun was readily apparent for five days in the past week: it blasted at least eight substantial coronal mass ejections...



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