NASA’s Voyager 2 came into close contact with Uranus and captured many images that uncovered 11 new moons.
Source
NASA's Mariner 10 became the first spacecraft to reach Mercury.
A US National Reconnaissance Office mission launched on a reused SpaceX booster for the first time.
The first American satellite, Explorer 1, was launched into space.
Europe's Planck spacecraft found evidence that our universe is 13.8 billion years old.
The Gemini V spacecraft returned to Earth, landing in the Atlantic Ocean.
