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National Optical Astronomy Observatory News


Dr. John Leibacher
National Solar Observatory

For More Information:
National Oceanic and Atmospheric Administration
Space Environment Center Boulder, CO
Barbara McGehan
(303) 497-6288

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This picture of the largest sunspot group in a decade shows the Sun in white light as seen by the National Science Foundation's Global Oscillation Network Group (GONG) instrument in Big Bear, CA., on March 30, 2001.

This whole sunspot covers more than 140,000 kilometers (86,8000 miles), 22 times the diameter of Earth, over the Sun's northern hemisphere.

This large sunspot group is visible on the sun with the naked eye, when sufficient filters are used to prevent damage to the eyes.

The National Solar Observatory is operated by the Association of Universities Research in Astronomy, Inc.(AURA), for the National Science Foundation.


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NOAO is operated by the Association of Universities for Research in Astronomy (AURA), Inc. under cooperative agreement with the National Science Foundation. Last updated 30 March, 2001.

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