|Astrodynamics is also called as orbital mechanics. It an application of celestial bodies and ballistics to the practical problems concerning motion of rockets and space crafts etc. It is the term used to explain the Newtonian mechanics in the modern physics to man made objects in space. Newton's law of universal gravitation and Newton's laws of Motion are the fundamental laws of Astrodynamics. The open access journals are peer reviewed scholarly journals of aerodynamics. The top open access journals are freely available on the public internet domain, allowing any end users to read, download, copy, distribute, prink, search or link to the full texts of the articles. These provide high quality, meticulously reviewed and rapid publication, to cater the insistent need of scientific community. These journals are indexed with all their citations noted. The top open access journals are indexed in SCOPUS, COPERNICUS, CAS, EBSCO and ISI.