Portal:Physics/Anniversaries/September

6 September 1809 - Sir George Cayley identifies the four aerodynamic forces
3 September 1821 - Faraday discovers electromagnetic rotation (the principle behind the electric motor).
- September 1911 - The Sackur-Tetrode Equation is published in Annalen der Physik.
29 September 1904 - Nature publishes Wood's letter discrediting N-rays.
27 September 1905 - E=mc² --- Annalen der Physik publishes the Mass–Energy equivalence
9 September 1934: The American Rocket Society (ARS) launched Rocket No. 4 to 400 feet.
17 September 1959 - The first powered X-15 flight.
9 September 1959 - The Atlas 10-D rocket is launched.
1 September 1974 - Pioneer 11 sends polar images of Jupiter.
20 September 1979 - The High Energy Astronomical Observatory (HEAO) 3 is launched.
- September 1981 - Invention of the scanning tunneling microscope.