Three Russian cosmonauts returned from space after spending a record time of 237 days in orbit.
Source
William Herschel discovered the first binary star.
Astronomer Nicolaus Copernicus made his first observation of Saturn.
NASA's Mariner 6 space probe successfully launched from Cape Canaveral, Florida.
NASA's New Horizons space probe completed the first flyby of Pluto in the history of human spaceflight.
The first crew arrived at the International Space Station onboard a Soyuz spacecraft.
