Astrobiology, as a scientific viable discipline, is a fast growing and emerging science. This is so because of the fantastic increase in technological means and methods to discover extra solar planets. Our space age, which provides us with incredible and powerful satellites like CoRot and Kepler, allows the detection of planetary systems in which not only giant gaseous planets revolve around a central star but also Earth-like planets (ELPs) covered with a significant fraction of their area with liquid (not necessarily water). On one hand, several planetary systems containing few planets were discovered. On the other hand, over 300 planets discovered so far, some tens appear to be ELPs and several systems with a number of planets were discovered. What can we expect from such planets? What kind of worlds there are? In particular, can we find planets the temperature and atmospheric pressure on which are close to the triple point of a certain molecule to facilitate unfamiliar and may be never speculated forms of life?