Over 200 exoplanets are known. None of the present detection methods measure the sense of 
the orbital direction. Based on the planetary orbits in our solar system it seems quite 
natural to assume that all these planets orbit the central star in the same direction as the 
star rotates. In theory it is possible that some planets could orbit in highly inclined 
orbits and even in an opposite directions. We will discuss various methods that could be 
used to detect the direction of the orbital motion in respect to the rotation of the central 
star.