Mariner was the first spacecraft to be launched to study Mercury on November 3, 1973
Launched by NASA, this robotic spacecraft was the first spacecraft to fly over multiple planets.
What is a fly-by or gravity assist? This is a technique used to increase the speed of an exploration vehicle when it is sent into space. The vehicle we are sending is spinning by the gravity of a planet. Utilizing this technology, a spacecraft can reach another planet or another destination in the shortest amount of time with the least amount of fuel.
Pioneer 10 is a spacecraft that travels through space at high speeds from planets using Gravity Assist technology.
In November 1973, Pioneer approached Jupiter.
Accelerate with the gravitational pull of Jupiter
Reached Saturn in 1976. The spacecraft gained some speed from Saturn and then approached Uranus in 1979 and then Neptune in 1983. They are still moving.
Voyager 1 and Voyager 2 are spacecraft brothers who flew out of the Solar System using Gravity Assist technology. NASA launched Voyager 2 for the first time on August 20, 1977; And then Voyager 1 on September 5th. More than 44 years
They are still in infinity.