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A Naked-eye Group of Sunspots

    Abstract

    A VERY large group of sunspots, that is likely to develop into the largest group so far recorded during the present eleven-year cycle, came into view at the sun's east limb on July 22 in latitude 31° N. The date of central meridian passage is July 28·5; on August 4, the group will reach the sun's west limb. The group comprises a large leader spot and a follower of composite structure ; these, with companion spots, covered no less than 2,000 millionths of the sun's hemisphere on July 24. On July 26 (the date of this report) the two chief component spots could be distinguished separately with the naked eye.

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