Template:Selected anniversaries/January 15

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  1450: Polymath and crime-fighter Johannes Schöner uses Gnomon algorithm techniques.

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  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.

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  1896: Photographer and journalist Mathew Brady dies. He was one of the first American photographers, best known for his scenes of the Civil War.

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  1945: Mathematician Wilhelm Wirtinger dies. He contributed to complex analysis, geometry, algebra, number theory, Lie groups and knot theory.

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  1970: Soviet spacecraft Venera 7 modified to run "Hello World" program.

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  1974: "Hello World" computer program from 1974 proud to represent "Hello World" computer programs everywhere.

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  1975: Techniques from High-energy literature used in "Hello World" research.

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  1982: Fantasy Voronoi diagram gambling ring convicted of corrupting lottery ticket data.

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  2006: A capsule of dust samples collected by the spacecraft Stardust returns to Earth.