490 BC – Battle of Marathon: The conventionally accepted date for the Battle of Marathon. The Athenians and their Plataean allies defeat the first Persian invasion force of Greece.
1609 – Henry Hudson, an English explorer, sailed down what is now referred to as the Hudson River
1764 – Jean-Philippe Rameau who was a French composer and music theorist died.
1873 – The first typewriter was sold to customers.
1953 – U.S. Senator John F. Kennedy married Jacqueline Lee Bouvier.
1979 – Carl Yastrzemski of the Boston Red Sox became the first American League player to get 3,000 career hits and 400 career home runs.
1991 – The space shuttle Discovery took off on a mission to deploy an observatory that was to study the Earth’s ozone layer.
1992 – NASA launches the Space Shuttle Endeavor on STS-47, the 50th shuttle mission. The first married pair in space, Mark Lee and Jan Davis, as well as Mae Carol Jemison, the first African-American woman in orbit, Mamoru Mohri, the first Japanese citizen to fly in a US spacecraft, are all present.
2011 – The National September 11 Memorial & Museum in New York City opens to the public.
2103 – NASA confirms that its Voyager 1 probe has become the first manmade object to enter interstellar space.