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  1. #1
    Mad Scientist's Avatar
    Mad Scientist Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields




    The Sun's X-file under the Spotlight

    One of the Sun's greatest mysteries is about to be unravelled by UK
    solar astrophysicists hosting a major international workshop at the
    University of St Andrews from September 6-9th 2004. For years scientists
    have been baffled by the 'coronal heating problem': why it is that the
    light surface of the Sun (and all other solar-like stars) has a
    temperature of about 6000 degrees Celsius, yet the corona (the crown of
    light we see around the moon at a total eclipse) is at a temperature of
    two million degrees?

    Understanding our nearest star is important because its behaviour has
    such an immense impact on our planet. This star provides all the light,
    heat and energy required for life on Earth and yet there is still much
    about the Sun that is shrouded in mystery.

    "The problem is like an Astrophysics X-file! It is totally counter
    intuitive that the Sun's temperature should rise as you move away from
    the hot surface," explains Dr Robert Walsh of the University of Central
    Lancashire and co-organiser of the workshop. "It is like walking away
    from a fire and suddenly hitting a hotspot, thousands of times hotter
    than the fire itself."

    More:
    http://www.pparc.ac.uk/Nw/soho15.asp

    --
    Usenet is filled with abusive and obsessive-compulsive-sociopathic personality disorder sufferers which makes it all the more easily ignored, dismissed and ridiculed.



  2. #2
    Saul Levy's Avatar
    Saul Levy Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields

    My, my! And I thought the basic cause was known. The corona is
    hotter because the density drops rapidly and is much less than the
    photosphere (the "surface" we see), and the photosphere is pumping
    tons of energy into the corona. Ions moving faster in a lower-density
    atmosphere appear to be hotter. Adding energy also makes those ions
    appear to be hotter. No big deal. That's basic thermodynamics.

    What those scientists are doing is unraveling all the nitpicking
    details. That's what scientists do. They've got the basics. Sure,
    there may be some mysteries about this process, but not the GREAT
    SHOCKING CRAP you are always pushing here.

    Saul Levy


    On Sat, 04 Sep 2004 01:17:15 GMT, Mad Scientist <alice@in.wonderland>
    wrote:


  3. #3
    Jonathan Silverlight's Avatar
    Jonathan Silverlight Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields

    In message <5vhmj0pdbsnj6c2b76kbga7vut1q5f6juu@4ax.com>, Saul Levy
    <saullevy1@cox.net> writes

    I'll agree with that last, but is there any consensus about how this
    heating is done? Ions in the corona don't just "appear to be hotter"
    than those in the photosphere, they _are_ enormously hotter and faster.
    Some process (in the photosphere ?) is pumping a lot of energy into the
    much lower density region above it.

  4. #4
    Mad Scientist's Avatar
    Mad Scientist Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields



    Jonathan Silverlight wrote:


    Translation: We know everything there is to know about the universe;
    what we don't know about the universe is very little; the little that we
    don't know is SHOCKING CRAP.

    --
    Usenet is filled with abusive and obsessive-compulsive-sociopathic personality disorder sufferers which makes it all the more easily ignored, dismissed and ridiculed.


  5. #5
    Wally Anglesea's Avatar
    Wally Anglesea Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields


    "Mad Scientist" <alice@in.wonderland> wrote in message
    news:BmI_c.954$wlx1.432@news04.bloor.is.net.cable. rogers.com...


    No, Yoe see, as Saul said, it's the stuff YOU push that's crap, and shocking
    crap at that, parrot.





  6. #6
    mista spanky's Avatar
    mista spanky Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields


    it's not strange at all, or is it ?
    i mean, if you put your hand in boiling
    water (100 celsius or more), you will be horribly scalded, but not as badly
    as if you had put your hand in a cloud of steam (200 celsius or greater).ie,
    steam is the stuff which is given off by boiling water.

    my guess is that the corona is the stuff being "boiled-off"or am i just
    making an unviable
    analogy ?
    lol, i dunno, but at least i tried.
    i figure that the electro-magnetic dynamics of solar-activity have much to
    do with this...







  7. #7
    Paul Lawler's Avatar
    Paul Lawler Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields

    "mista spanky" <blah@blah.com> wrote in
    news:1dCdnTVU2tmDBMXcRVnyjQ@pipex.net:


    Dear Mr. Spanky... I have only 3 words of advice for you.

    Lurkers learn lots.

  8. #8
    Karl Heinz Buchegger's Avatar
    Karl Heinz Buchegger Guest

    Default Astrophysicists Focus on Sun's Magnetic Fields

    mista spanky wrote:

    But the steam above boiling water has 100 celsius too.

    --
    Karl Heinz Buchegger
    kbuchegg@gascad.at

 

 

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