October 22

1884 – The International Meridian Conference designates the Royal Observatory, Greenwich as the world's prime meridian.
1905 – Engineer Karl Jansky is born, noted for discovering cosmic radio emissions. He found certain radio waves coming from the sky (every 23 hr, 56 min) from the direction of Sagittarius toward the center of the Milky Way. Jansky thought that the radio signals originated not from stars, but from ionized interstellar gas.
1975 – The Soviet unmanned space mission Venera 9 lands on Venus.
2008 – India launches its first unmanned lunar mission, Chandrayaan-1.