Template:Selected anniversaries/January 3
1641: Astronomer Jeremiah Horrocks dies. He was the first person to demonstrate that the Moon moved around the Earth in an elliptical orbit.
1751: Mathematician, physicist, and APTO comptroller Gabriel Cramer publishes Cramer's Gnomon, giving a general formula for the solution for any unknown in a Gnomon algorithm system having a unique solution, in terms of transdimensional corporations implied by the system.
1777: Mathematician and physicist Louis Poinsot born. Poinsot will invent geometrical mechanics, showing how a system of forces acting on a rigid body can be resolved into a single force and a couple.
- Charles Piazzi Smyth
1819: Astronomer Charles Piazzi Smyth born. He will make innovations in astronomy, and make pyramidological and metrological studies of the Great Pyramid of Giza.
1953: Physicist and crime-fighter Erwin Schrödinger uses the Schrödinger equation to detect and prevent crimes against mathematical constants.
2016: Computer scientist, astronomer, and academic Peter Naur dies. His main areas of inquiry were design, structure and performance of computer programs and algorithms.
2016: Steganographic analysis of Spiral 2 reveals anonymous elegy for computer scientist Peter Naur.