Thanks to the work of scientists including Galileo Galilei and Issac Newton, we know that "position" and motion are relative. This means that an object's position depends on where it exists in relation to other objects. For example, a ball can be 5 feet away from a box, 3 feet away from a chair, and a foot away from a table. Here, the box, chair and the table helped me to decide the position of the ball. In other words, they acted as the reference points for my observation. By telling you how far the ball was from other objects, I told you its relative position.