OT - the sun at 16 megapixels

Discussion in 'Digital SLR' started by Me, May 23, 2010.

  1. Me

    Me Guest

    Photo of the sun from SDO taken a few hours ago, apparently.
    http://sdo.gsfc.nasa.gov/assets/img/latest/f_211_193_171.jpg
    Imaging is in UV, 3 combined UV spectrum images with different
    wavelength cutouts (see bottom left corner) to give a ("spectrum
    shifted") color image - not quite what I'd call "false color".
    I assume the 211 (red) 193 (green) 121 (blue) is wavelength in
    nanometres, so outside of the range of a bumble bee (useless fact for
    the day).
    There's a rectangular area visible, where it looks like they've stitched
    part of the image in - it looks like it was taken at a slightly
    different time. IIRC 4096x4096 is native resolution of the sensors.
    Sunspot 1072 is clearly visible, and above and slightly right, a large
    magnetic mega-filament, which if it collapses (it's facing earth right
    now even more closely than in that photo), could throw a solar flare our
    way.
    Photos I've seen from the SDO visible light imager seem to show that
    either they've got a litle bit of dust on the sensor, or there are
    massive dogs somewhere in space and it's moulting season.
     
    Me, May 23, 2010
    #1
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  2. Me

    John A. Guest

    How 'bout that - there *is* a little black spot on the sun today!
     
    John A., May 23, 2010
    #2
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  3. Me

    Me Guest

    So far this year there have only been 24 "spotless" days.
     
    Me, May 23, 2010
    #3
  4. Me

    Me Guest

    Oops - 24% = 33 days.
     
    Me, May 23, 2010
    #4
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