On November 20, 1889, American astronomer Edwin Hubble was born. He is best known for his role in establishing the field of extragalactic astronomy and is generally regarded as one of the most important observational cosmologists of the 20th century.
On February 21, 1947, American scientist and inventor Edwin Land introduced the very first instant camera together with an associated film. Land's new camera would allow people to produce a black and white photograph in about sixty seconds. The new film already contained the necessary chemicals to develop and fix the image directly on the photographic paper.
On July 20, 1969 (for us western Europeans it was July 21, 3:56 MEZ) United States' space mission Apollo 11 reached the moon and the lunar module Eagle and the astronauts Neil Armstrong and Edwin "Buzz" Aldrin.