To put it simply, propulsion is the creation of force that leads to movement, but with todays technological and engineering advances, were able to move ships across the ocean and put spacecrafts in the sky. Soon, developments in propulsion will lead to new scientific products, more efficient machinery and even lower gas mileage. Propulsion, specifically space propulsion, is based on the third law of motion which means that for every action theres a return reaction, Tim ODonnell of NASAs Jet Propulsion Laboratory told The Huffington Posts Katie Linendoll. …