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Solar Week - Ask a Question » Archives of previous runs of Solar Week » 2010 Apr 12-16 » Facts about the Sun » Sun

Sun

Last post 04-15-2010 5:21 AM by Emilia Kilpua. 2 replies.
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  • 04-14-2010 10:56 AM

    Sun

    Reply Contact
    Arno Why is the corona so hot compared to the Sun's surface?

  • 04-14-2010 3:50 PM In reply to

    • KD Leka
    • Top 10 Contributor
    • Joined on 02-27-2005
    • Boulder, Colorado
    • Posts 56

    Re: Sun

    Reply Contact

     hi, that is a very hot topic for study right now.  It is starting to be clear that the corona is heated in some way due to energy being transported from the lower parts of the solar atmosphere up.  The solar magnetic field likely has a strong role in heating the Corona, either by releasing energy itself as it gets tangled up or by funneling some of the energy in the form of waves. 

  • 04-15-2010 5:21 AM In reply to

    • Emilia Kilpua
    • Top 10 Contributor
    • Joined on 03-11-2008
    • University of Helsinki, Finland
    • Posts 61

    Re: Sun

    Reply Contact

    A Japanese spacecraft Hinode (the name means "sunrise") has made impressive observations about possible Alfven waves in the solar corona. You can read the story and see some movies from http://www.esa.int/esaCP/SEMGUB29R9F_index_0.html#subhead3 
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