ABSTRACT
SUMMARY: The environment in which mankind currently lives is the end result of a long process of chemical and biophysical development which is not, as yet, fully understood. The main aim of this chapter is to provide insight into star-molecular cloud encounters, and thus to improve our understanding of the evolution of the solar system. The scattering of stellar orbits by galactic molecular clouds was studied in hope of explaining isotopic peculiarities of presolar grains from Asymptotic Giant Branch (AGB) stars. Silicon isotopic anomalies found in the mainstream silicon carbide (SiC) grains, for example, were observed to have heavy isotopes enrichment. This work aims to seek a possible theory for such richness and peculiarity through scattering of AGB stars in molecular clouds. A successful explanation to this problem will influence how we think nuclides were formed and then distributed in the Galaxy. It will shed new light unto the chemical environment on Earth This type of study will allow us to better appreciate the earth’s environment and how it has affected the evolution of life on the planet. The scientific community, not just astrophysicists, shares such interests.
