The physical characteristics of habitable planets have been critically examined considering the various properties of solar-system with special reference to Earth. The consequences of abiotic chemical evolution have been focused with an emphasis to the theories of life formation. Also roadmaps for the habitability of planets have been sketched for a re-look of the biogenic effects. Objects of planetary size at the distances of the closest stars cannot be identified optically, even under the most favorable conditions. The usual practice is therefore to implement, wherever possible, available factual material and known relationships. Reasonable inferences in many times are based on models constructed from observations of conditions in the solar system. Dependence on existing theories becomes necessary where no direct data exist, as all known chemical and physical laws must be obeyed elsewhere in the universe. At the beginning of the last century scientists have emphasized by speculation about the existence of life on other planets but only in a qualitative manner (Cameron, 1963, Sagan, 1963, Rood and Trefil, 1981). In order to establish reasonable quantitative limits from which the prevalence of habitable planets can be estimated, it is essential to define more precisely what is meant by a habitable planet. One can imagine different categories of habitable planets that could support some unknown form of life, planets that could support microscopic forms of carbon-based life and planets that could support various extreme forms of terrestrial life like organisms living in seas of liquid ammonia or breathing gaseous sulfur or existing under any other such alien conditions (Goldsmith et al. , 1993, Ulmschneider, 2002). However, by the term "habitable planet" we essentially mean a planet with surface conditions suitable for population. The environmental conditions required by population as well as the astronomical circumstances that produce these requisite environmental conditions are very important factors. Many of the questions raised here cannot be answered definitively due to the deficiencies or limitations of our knowledge of the universe at the present time. It is true that our solar system is not an extraordinarily rare assemblage of bodies, but is a typical planetary system and its members can be treated as a good sample of the types of bodies that exist in proximity to other stars (Bhattacharya et al. , 2012). Even in full recognition of the incompleteness of our knowledge, we can extend the range of the habitable planets so that future studies can apply it conceptually to estimate the probabilities that these astronomical concatenations will be found elsewhere in the Galaxy and also to the other galaxies in the immediate neighborhood of the Sun.