Astronomy Islam 18 Religious aspects 17 Islam and science 5 Islamic calendar 5 Astronomy, Arab 3 Dissertations, Academic 3 Islamic astronomy 3 Moon 3 Science 3 Astronomical photometry 2 Criticism, interpretation, etc 2 Data processing 2 Dissertations 2 Early works to 1800 2 History 2 Islamic cosmology 2 Prayer 2 Religious aspects Islam 2 Research 2 Stars 2 Study and teaching 2 Alchemy 1 Astrology 1 Astronomical observatories 1 Astronomy, Islamic 1 Calendar 1 Celestial mechanics 1 Chronology 1 Collected works 1