• Click Here to Read Papers about Crescent Visibility and Prayer Times
  • Click Here to see the Crescent World Records

International Astronomical Center

IAC Mailing Lists


IAC has three mailing lists or groups. The first list is dedicated to the members of the Islamic Crescents Observation Project (ICOP). This lists discusses the issues related to the crescents, prayer times, Hejric calendar, Qiblah direction and the related issues. Members or interested persons can join it by clicking on the below image.


The second list is a general announcing (not discussion) list, which is used to send important announcements or news related to the IAC, or to send important astronomical news. Interested persons might join it by clicking on the below image.


The third list is dedicated to the members of the Satellite Reentry Watch Program (SRW). This list is used to send the predictions of upcoming re-entries and to discuss the related topics. Interested persons might join it by clicking on the below image.


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