Astronomy could be a scientific discipline that's the study of celestial objects (such as moons, planets, stars and galaxies), the physics, chemistry, and evolution of objects, and phenomena that originate outside the atmosphere of Earth, and as well as supernovae explosions, gamma radiation bursts, and cosmic microwave background. A connected however distinct subject, cosmology, is bothered with finding out the universe as an entire.
The impact factor of journal provides quantitative assessment tool for grading, evaluating, sorting and comparing journals of similar kind. It reflects the average number of citations to recent articles published in science and social science journals in a particular year or period, and is frequently used as a proxy for the relative importance of a journal within its field. It is first devised by Eugene Garfield, the founder of the Institute for Scientific Information. The impact factor of a journal is evaluated by dividing the number of current year citations to the source items published in that journal during the previous two years.
Last date updated on June, 2014