Kitt Peak National Observatory Vacuum Telescope Facility Images courtesy of the National Solar Observatory, a Division of the National Optical Astronomy Observatories, which is operated by AURA, Inc. under a cooperative agreement with the National Science Foundation Observatory Contributions Synoptic observations have been made of the Sun over the last twenty years and will be continuing in the future. Research time is allocated competitvely. A measurement of the polarization of the first two of these lines allows a determination of the Sun's magnetic field structure.
Solar images are partially available over the internet.
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