Abstract
A LARGE GROUP OF SUN-SPOTS.—A remarkable spot outburst, including a great irregular active spot followed by a widespread disturbed area, was easily seen with the help merely of dark glasses on May 27, 28, and 29. Its reappearance on the eastern limb should occur about June 12 or 13.
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Our Astronomical Column . Nature 97, 311 (1916). https://doi.org/10.1038/097311a0
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DOI: https://doi.org/10.1038/097311a0