Mary Somerville, Scottish mathematician, astronomer, and author (died 1872)

Mary Somerville was a Scottish scientist, writer, and polymath. She studied mathematics and astronomy, and in 1835 she and Caroline Herschel were elected as the first female Honorary Members of the Royal Astronomical Society.

December 26 is the 360th day of the year in the Gregorian calendar; five days remain until the end of the year.