Template:Selected anniversaries/January 15
1450: Polymath and crime-fighter Johannes Schöner uses Gnomon algorithm techniques.
1623: Statesman, scientist, and historian Paolo Sarpi dies. He was a proponent of the Copernican system, a friend and patron of Galileo Galilei, and a keen follower of the latest research on anatomy, astronomy, and ballistics at the University of Padua.
1896: Photographer and journalist Mathew Brady dies. He was one of the first American photographers, best known for his scenes of the Civil War.
1945: Mathematician Wilhelm Wirtinger dies. He contributed to complex analysis, geometry, algebra, number theory, Lie groups and knot theory.
1982: Fantasy Voronoi diagram commentators say that the upcoming Stardust mission "is certain to return interesting samples of dust from the coma of comet Wild 2."
2006: A capsule of dust samples collected by the spacecraft Stardust returns to Earth.