The exoplanet Kepler-47 b was found in 2012 using transit method. It is the inner planet in an arrangement of 2 planets orbiting around Kepler-47system, located in the constellation of Cygnus in 4892 light years from the Sun. [7]. It is the smallest planet of the two present in system. Despite being the smallest circumbinary planet detected to this date, the inner planet, Kepler-47 b still has a radius of 3.0±0.1 Earth radii. In addition, too small to be measured directly, has been determined to have a 3-α upper limit of 2 Jupiter masses. This determination is based on non-detection of timing variations of stellar orbit. As the mass of planet is not known which means its density also remains undetermined. This in return means that it’s not
