ABSTRACT
A clear understanding about the origin of the Earth and its ability to support life is the main objective for scientists engaged in the field of astronomy. Those studying this subject gain knowledge about orbits, chemical properties, and physical history that help in the process of understanding how it is all possible. The cooler objects (thermally) and dust in the outer solar system provide evidence of conditions in the early solar system and can be directly compared to cool objects and dust observed around other stars. An absolute requirement for life is an energy source. For planetary habitability, there are many geophysical, geochemical, and astrophysical criteria that must be met before an astronomical body can support life. In the astrobiology roadmap, NASA has pointed out the principal habitability criteria as “extended regions of liquid water, conditions favorable for the assembly of complex organic molecules and energy sources to sustain metabolism” [1].
