The term 'Circles the Earth' is a reference to the fact that the Earth is in orbit around the Sun. This is known as an orbit, which is defined as a curved path of an object around a point in space. The crossword solution for this term is 'Orbits, ' which is a six-letter word. This term is used to describe the motion of the Earth around the Sun, which is a circular path that takes 365 days to complete.