Epistelogically, hisab [calculation] and rukyah [sight] are different subjects. Each of them has its own method, the basic, standard and validity of knowledge, so that the decisions they make are a…
Ilmu Falak [Astrography] has long history in human civilizations. It grows together with the development of mankind knowledges. Moslems has adopted it from other civilizations and given some correc…