The detection of habitable worlds is one of humanity's greatest endeavours. So far, astrobiological studies show that one of the most critical components to allow life development is liquid water. Its chemical properties and its capacity to dissolve and hence transport other substances makes this constituent a key piece in the development of life. As a consequence, looking for life as we known it is directly related to the search for liquid water. In this sense, the habitable zone of a star defines the range of distances from the star in which water could be in liquid state on the surface of a rocky world. Although basic and not unique (water might also be in liquid state in other circumstances, see for instance the Europa subsurface ocean) the habitable zone is a first step towards the search for life in distant planetary systems. The KOBE experiment seeks for new worlds in this regime.