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Agnes Mary Clerke (February 10, 1842 - January 20, 1907) was an Irish astronomer and writer. She was interested in astronomy from an early age, and had begun to write about it before the age of 15. Her first important article, Copernicus in Italy, was published in the Edinburgh Review in October 1877. She achieved a worldwide reputation in 1885, on the appearance of her treatise, A Popular History of Astronomy during the Nineteenth Century. She was not a practical astronomer, instead collating, interpreting and summarizing the results of astronomical research. In 1903, with Lady Huggins, she was elected an honorary member of the Royal Astronomical Society, a rank previously held only by two other women, Caroline Herschel and Mary Somerville. She died in 1907 and the age of 64.