Astronomer William Herschel first observed Uranus.
Source
Halley's Comet was last seen from Earth. It only orbits the Earth once every 75 to 76 years.
NASA's Apollo 11 orbited the moon.
Robert H. Lawrence, Jr. was selected as the first African-American astronaut.
The first all-female spacewalk took place.
The first crew arrived at the International Space Station onboard a Soyuz spacecraft.
