Maria Margarethe Kirch, German astronomer and mathematician (died 1720)

Maria Margaretha Kirch was a German astronomer. She was one of the first famous astronomers of her period due to her writing on the conjunction of the sun with Saturn, Venus, and Jupiter in 1709 and 1712 respectively.

February 25 is the 56th day of the year in the Gregorian calendar; 309 days remain until the end of the year.