Illustration of exoplanets (black circles), discovered by WASP (wide angle search for planets) and ESO (European southern observatory) telescopes. The exoplanets have unusual retrograde orbits, which is when exoplanets orbit in the opposite direction to the rotation of their star. The stars are shown to scale, with their rotation axes pointing up. The exoplanets are shown just before mid-transit of their parent star. At lower right is an exoplanet with a normal orbital direction for comparison. Each image size is three solar diameters.