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Reference of Measurements in Halacha: Difference between revisions
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Reference of Measurements in Halacha (view source)
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* [http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha Rav Hershel Schachter on yutorah.org] (min 72-77) says that sunset should be determined as though the mountains to the east and west are at sea level and do not block the visibility of the sun. However, the elevation of the place one is currently located is taken into consideration and if one is in a valley the sunset is a little later (less than 5 minutes) than what would have been visible. Yet, he adds, that most opinions hold that regarding sunrise both one’s location’s elevation and surrounding mountains are taken into consideration. </ref> | * [http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha Rav Hershel Schachter on yutorah.org] (min 72-77) says that sunset should be determined as though the mountains to the east and west are at sea level and do not block the visibility of the sun. However, the elevation of the place one is currently located is taken into consideration and if one is in a valley the sunset is a little later (less than 5 minutes) than what would have been visible. Yet, he adds, that most opinions hold that regarding sunrise both one’s location’s elevation and surrounding mountains are taken into consideration. </ref> | ||
==Shekiyah (Sunset)== | ==Shekiyah (Sunset)== | ||
# Shekiyah is sunset which , in general,is halachically the same as the astronomical calculation of sunset. <ref>[http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha Rav Hershel Schachter on yutorah.org] (min 69-72) says that sunset is the same as the sunset calculated by the naval observatory which is when the sun has completely set. </ref> | # Shekiyah is sunset which, in general, is halachically the same as the astronomical calculation of sunset. <ref>[http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha Rav Hershel Schachter on yutorah.org] (min 69-72) says that sunset is the same as the sunset calculated by the naval observatory which is when the sun has completely set. </ref> | ||
==Tzet HaCochavim (Emergence of the stars)== | ==Tzet HaCochavim (Emergence of the stars)== | ||
# There's a major dispute when Tzet HaCochavim is: Rabbenu Tam assumes that it's about 72 minutes after Shekiyah and the Gra assumes that it's three quarters of a mil after Shekiyah, varying according to one's locations. <ref>Rabbi Hershel Schachter on [http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha# yutorah.org (min 43-5)] explains that many practice like the Gra regarding Tzet HaCochavim on Motzei Shabbat. See Biur HaGra and Mishna Brurah 261. Pri Megadim assumes that according to Rabbenu Tam, 72 minutes is a fixed time, but Mishna Brurah writes that it varies according to one's location.</ref> | # There's a major dispute when Tzet HaCochavim is: Rabbenu Tam assumes that it's about 72 minutes after Shekiyah and the Gra assumes that it's three quarters of a mil after Shekiyah, varying according to one's locations. <ref>Rabbi Hershel Schachter on [http://www.yutorah.org/lectures/lecture.cfm/728553/Rabbi_Hershel_Schachter/Shiur_on_Zmanim_in_Halacha# yutorah.org (min 43-5)] explains that many practice like the Gra regarding Tzet HaCochavim on Motzei Shabbat. See Biur HaGra and Mishna Brurah 261. Pri Megadim assumes that according to Rabbenu Tam, 72 minutes is a fixed time, but Mishna Brurah writes that it varies according to one's location.</ref> | ||
