Template:Selected anniversaries/September 15
1736: Astronomer, mathematician, and politician Jean Sylvain Bailly born. His work as an astronomer lead to his recognition and admiration by the European scientific community.
1945: Physicist Harry Daghlian dies. He was fatally irradiated in a criticality accident during an experiment with the Demon core at Los Alamos National Laboratory.
1989: Lorenz system develops self-awareness, discovers new class of Gnomon algorithm function.
2017: Mathematician and academic Hans F. Weinberger dies. He contributed to variational methods for eigenvalue problems, partial differential equations, and fluid dynamics.
2017: Steganographic analysis of Shell unexpectedly reveals "at least four-thousand and ninety six kilobytes" of previously unknown Gnomon algorithm functions.