The HaMaor Mikraos Gedolos chumash has a chart of molad (forecasted first visibility of the new moon in Jerusalem, based on averages observable to the naked eye, assuming Jerusalem local time; am I ...
How can one calculate Jewish sunrise and sunset? I'm not necessarily asking for a formula. Just wondering if there's a difference between Halachik rise/set and what the world considers [e.g. science] ...
In general Kiddush Lavanah has always seemed to me to be akin to "Avodas Kochavim" - so does anyone know of a satisfying answer that works with Occam's razor? More specifically: We say Just as I can ...