![[Sunspot]](/image_gallery/images/d3/5016b.jpg)
Two white light images of a sunspot, using different exposures, and obtained during exceptionally good seeing conditions at Kitt Peak. This picture was taken at the McMath-Pierce Solar Facility.
Downloadable versions (see
NOAO Conditions of Use):
Taken on September 9th 1990 by Dr Bill Livingston with the McMath-Pierce
Solar Telescope.
Minimum credit line: Bill Livingston/NSO/AURA/NSF
(for details see Conditions of Use)
597 x 400 33 kb color JPEG
1464 x 982 144 kb color JPEG
1464 x 982 1.4 Mb 8-bit color TIFF
1464 x 982 4.2 Mb 24-bit color TIFF
Two white light images of a sunspot, using different exposures,
and obtained during exceptionally good seeing conditions at Kitt Peak.
One view is the more conventional picture of a unipolar sunspot near the
solar disk center, taken from a full-disk magnetogram with an exposure
of 1/500 seconds. Suspended over the umbra is a rope-like light bridge.
The outer diameter of the spot is about 32 arc seconds (14 thousand miles).
The other view is the same but overprinted with umbral information
obtained from a longer exposure of 1/150 seconds. This shows fibrous
intrusions delineating still darker areas. The shorter exposure
reveals the solar granulation and the longer brings out details in the
darker umbrae. When these two exposures were suitably combined. the
umbra of one small sunspot was resolved into an approximately
filamentary structure, connecting to the penumbra, along with a number
of featureless voids.
Return to:
solar page.
Comments by e-mail to images@noao.edu
