Michael Minovitch is a person who was very smart and came up with a really cool idea about space travel. He thought of a special way for spaceships to move in space without using too much fuel. It's like when you're on a swing and you swing your legs back and forth to make you go higher and higher, Michael Minovitch thought of a way for a spaceship to move using the gravity of planets, and moons to speed up and slow down the spaceship without using a lot of extra fuel. This idea is called "gravity assist" and is still used today by NASA when they send spaceships to explore other planets in our solar system. So basically, Michael Minovitch is a very smart man who helped us get to space in an easier way.