The Daily Croissant

Eclectic Perambulations in the Noosphere

  • The Coronal Mass Ejection of April 16, 2012

    • 23 Apr 2012
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    • April 23 2012 CME Film Shorts Solar Flares Sunstorm sun
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    See the Earth at the upper-left of the image to compare size relationship.

    "The M1.7-class flare that erupted from active region 1461 on Monday, April 16 let loose an enormous coronal mass ejection many, many times the size of Earth, making this particular writer very happy that our planet was safely tucked out of aim at the time… and 93 million miles away."

    via universetoday.com

     

    "The big solar flare and coronal mass ejection earlier this week created an unusual event on the Sun: it rained. Not water drops of course, but coronal rain. After the eruption, blobs of plasma fell back to the surface of the Sun, sometimes making ‘splashes’ where they hit. Coronal rain is plasma gas that condenses in the corona and then descends back to the surface. It has long been a mystery and its motion has perplexed solar physicists. For some reason, coronal rain falls much slower than is expected for plasma falling due to the huge gravitational pull of the Sun. Many times, rather than falling straight down — as it would if gravity was the only force pulling on it — the plasma rain follows invisible magnetic field lines, which can be detected by instruments on board watchful spacecraft."

    "SDO observed a beautiful prominence eruption shot off the east limb (left side) of the Sun (April 16, 2012). Such eruptions are often associated with solar flares, and in this case an M1.7 class (medium-sized) flare did occur at the same time, though it was not aimed toward Earth. The movie (in extreme ultraviolet light) covers four hours of activity. As we have observed in some other events, some of the charged particles do not have enough force behind them to break away and they can be seen streaming back into the Sun."

    BigBlast304_fnl_best.mpg   - mpeg movie

    via sdo.gsfc.nasa.gov

     

     

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  • Comet and CME on the Sun

    • 13 Oct 2011
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    • 12October11 Astronomy CME Comets Explosion sun
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    "Did a sun-diving comet just cause a solar explosion? Probably not. Recently, this comet dove toward the Sun and was followed very quickly by a Coronal Mass Ejection (CMEs) from the other side of the Sun. The first two sequences in the above video shows the spectacular unfolding of events as seen by the Sun-orbiting SOHO satellite, while the same events were also captured by both Sun-orbiting STEREO satellites."
    via apod.nasa.gov

     

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