The shape of Earth's orbit is an OVAL, which is a four-letter word. An OVAL is a closed curve in a plane that consists of two arcs that are joined at their endpoints. It is a type of ellipse, which is a curved line that has two focal points. The shape of Earth's orbit is an ellipse, with the Sun being one of the two focal points. This means that the Earth is not always the same distance from the Sun, but instead its distance varies depending on where it is in its orbit.