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    The Sun is
    strongly 
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    affected by
    magnetic 
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    forces. The red arrows 
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    show the
    polar field lines of 
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    the Sun’s
    global magnetic 
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    field. The orange field 
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    lines show
    the magnetic 
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    field lines
    of the active 
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    regions.  Each active 
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    region has
    its own pair of 
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    North and
    South polarities. 
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    The field
    lines joining them 
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    form the
    graceful arching 
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    loops seen in
    Yohkoh X- 
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    ray images. 
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