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  • Image of the sun with solar storms

    STEREO Reveals the Anatomy of Solar Storms

    STEREO spacecraft images and in situ measurements combine to show a complete picture of CMEs that paves the way for predicting solar storms like meteorologists predict hurricanes.

  • Beauty shot of STEREO

    Join STEREO and Explore Gravitational "Parking Lots" That May Hold Secret of Moon's Origin

    Two places on opposite sides of Earth may hold the secret to how the moon was born.

  • STEREO orbit

    STEREO in Quadrature

    January 24, 2009 marks the point at which the two STEREO spacecraft reach 90 degrees separation, a condition known as quadrature. Since the two STEREO spacecraft went into orbit around the Sun at the beginning of 2007, they have been slowly drifting apart from Earth, and from each other. After two years in solar orbit, the two spacecraft have finally reached quadrature.

  • hi1-B image of the comet p2003k2

    SECCHI Makes a Fantastic Recovery!

    You would think that, after 13-years of historic comet discoveries with SOHO and two years of amazing STEREO/SECCHI observations and discoveries, we had put a check-mark in most of the boxes for comet-related achievements. But last week, Australian comet-hunter Alan Watson helped us with yet another historic achievement -- the recovery of a comet! Here's how it unfolded.

  • image of solar flare

    Solar Flare Surprise

    Solar flares are the most powerful explosions in the solar system. Packing a punch equal to a hundred million hydrogen bombs, they obliterate everything in their immediate vicinity. Not a single atom should remain intact. At least that's how it's supposed to work.

  • solarjet_100x75

    Twisting Solar Jets in STEREO

    Coronal jets are small-scale transient ejections of hot gases, or plasma, occurring in the solar atmosphere. During a typical event, about a million tons of matter are ejected at speeds reaching a million miles per hour over a few minutes' time.

  • 195tsunami_100x75

    Solar Tsunami - May 19, 2007

    Sequences of STEREO satellite images of a solar tsunami blasting across the Sun's million degree atmosphere.

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