Portal:Physics/Anniversaries/April


 * 1 April 1997 – Comet Hale-Bopp at perihelion
 * 12 April 1633 – Galileo Galilei's trial starts
 * 15 April 1707 – Leonhard Euler's birthday
 * 18 April 1955 – Albert Einstein's death
 * 22 April 1904 – J. Robert Oppenheimer's birthday
 * 23 April 1858 – Max Planck's birthday
 * 24 April 1990 – Hubble Space Telescope launched
 * 25 April 1990 – Hubble Space Telescope deployed from the shuttle Discovery
 * 30 April 1777 – Carl Friedrich Gauss's birthday