The Great Z'manim Debate

Authored in English in order to acquaint bnei Torah with the fundamentals of astronomy and to explain the various shitos in z’manim, such as bein ha’shemashos and alos ha’shachar … One who learns from this sefer will enjoy it and be enlightened.

Harav Shlomo Miller

The study of the motion of the sun has many applications in limud HaTorah — the most halachah l’maaseh in regard to calculating z’manei ha’yom…. Written in extraordinarily clear terms…this complex topic [is now] accessible to many.

Harav Yisroel Reisman

Unfortunately, there are many parts of Torah that are written in language and description alien to us, which greatly hampers our understanding of that part of Torah. One of those areas is the area of astronomy, that figures in greatly in halachah and Agaddah. [This is a] remarkable work explaining these sugyos. [The author] has mapped out different Rishonim’s shitos, [with an] understanding of what was meant, and explains both the realia and the halachah most lucidly. It is an incredible work of a chashuva talmid chacham, yerei Shamayim, and most knowledgeable person. It is thorough and lucid.

Harav Ahron Lopiansky

Rabbi Ahron Notis is a talmid of Telz Yeshiva in Cleveland, Brisk Yeshiva in Yerushalyim, and Bais Medrash Govoah of Lakewood. He has received semichah in both Yoreh De’ah and Choshen Mishpat. He is a marbitz Torah of many years, both as a rebbi and a Rosh Kollel. Currently, he serves as a rebbi in Mayan Hatalmud Yeshiva in Lakewood and works as a researcher for ArtScroll Publications. He is the author of Chikrei Ahron on sugyos in halachah.