11 October in history.

1984

Kathryn Sullivan walks in space. Kathryn D. Sullivan stepped outside the Space Shuttle Challenger. No American woman had done a spacewalk before her. 1

Wikipedia: Space Shuttle Challenger

Photo: NASA / Wikimedia Commons (Public domain)

More from 11 October

1. 1852

   The University of Sydney opens

   The University of Sydney, Australia's oldest university, held its opening, two years after it was set up by law.

   Wikipedia: University of Sydney

2. 1950

   Colour TV gets its first green light

   A colour television system invented by engineer Peter Goldmark became the first to be approved for commercial use. It was dropped a year later.

   Wikipedia: Field-sequential color systemWikipedia: Hungarian AmericansWikipedia: Peter Carl Goldmark

3. 

   1968

   Apollo 7 lifts off

   Apollo 7 launched from Cape Kennedy, Florida. It was the first crewed flight of NASA's Apollo program and the first American mission to carry three astronauts.

   Wikipedia: Apollo 7Wikipedia: Human spaceflightWikipedia: NASA

   Photo: NASA / Wikimedia Commons (Public domain)

4. 

   2000

   The 100th Space Shuttle mission lifts off

   NASA launched STS-92, the 100th mission of the Space Shuttle.

   Wikipedia: STS-92

   Photo: NASA/JSC / Wikimedia Commons (Public domain)

Moments chosen for discovery, creativity and courage. Each one links to a source where you can read more; photos are credited to their owners.