Annie S. D. Maunder

Irish astronomer (1868–1947)

Annie Scott Dill Maunder (née Russell; 14 April 1868 – 15 September 1947) was an Irish astronomer, who recorded the first evidence of the movement of the sunspot emergence from the poles toward the equator over the 11-year solar cycle, finding the now-called Maunder Minimum. As sole author, she also devised with her husband, Edward Walter Maunder, the butterfly diagram for sunspots. Alone, she discovered that the sunspots in the Sun were asymmetrical.

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