Radio astronomy deals with the study of radiation with wavelengths greater than 1 mm. This is different from other forms of observational astronomy in that the observed radio waves can be treated as waves rather than as discrete photons. Hence, it is relatively easier to measure both the amplitude and phase of radio waves. Journal of Astrophysics and Aerospace Technology publishes complete and reliable source of information on the discoveries and current developments in the mode of original articles, review articles, case reports, short communications etc. Open access articles are essentially peer-reviewed and available for access through the directory of Open Access journal. International Journals supports the system and provides access to 700+ peer-reviewed journals with no restrictions rand thus promotes the Open Access movement with a view to promote scientific advancement. The digital peer reviewed journals cover the novel and current scientific studies taking place across universities and research centres in various parts of the world. Each open access journal delivers the latest updates in the respected research area in various formats so that subscribers can access the same through various options. With the growing number of scientific enthusiasts and readers by a large margin, efficacy of open access publishing has witnessed an assertive impact. The importance of Peer-reviewed open access journals has also grown in modern learning environment as most of the students need a swift and instant access to published research work free of cost. Most of the Open access articles can be cited with proper reference boosts the prospects of research. A journal is a periodical publication intended to further progress of science, usually by reporting new research. Most journals are highly specialized, although some of the oldest journals publish articles, reviews, editorials, short communications, letters, and scientific papers across a wide range of scientific fields. Journals contain articles that peer reviewed, in an attempt to ensure that articles meet the journal standards of quality, and scientific validity. Each such journal article becomes part of the permanent scientific record.