Each requires a means of steering, an engine or motor for transporting the vehicle, and a way of positioning the driver or passengers in order for them to control and ride inside the vehicle. When something does not seem correct about the science fiction art, try to classify which of the items below may be violated by the drawing. For example, some artists fail to draw a viewing window for the pilot of a spacecraft to see where the craft is going. Others, leave out a hatch for the astronaut to enter or leave the vehicle. Below is a list of some of the most obvious abuses of the laws of science in science fiction art.
Every action requires an equal and opposite reaction.
This is Newton's third law. It is taught in science in elementary school. It is one of the scientific laws often found inconsistent with sci-fi artwork. Showing a spacecraft doing a space maneuver without steering thrusters is an example of violating this law of science. Having two opposing spacemen boxing in space as though on Earth is another example of its abuse.