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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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# 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> | ||
==Ben HaShemashot== | ==Ben HaShemashot== | ||
# Ben HaShemashot is the time period between certain daytime and certain nighttime. In many halachot, it is considered a doubt whether it is considered day or night and has many practical ramifications. There is a major dispute how long this period is. | # Ben HaShemashot is the time period between certain daytime and certain nighttime. In many halachot, it is considered a doubt whether it is considered day or night and has many practical ramifications. There is a major dispute how long this period is. <ref> | ||
* Gemara Shabbat 34b says Ben HaShemashot is considered as a doubt whether it is considered daytime or nighttime. The Gemara also says that in regards to practical ramifications it is always considered the part of the day which is a stringency. When is Ben HaShemashot? Rabbi Yehuda says that Ben HaShemashot starts from Shekiyah and concludes when the entire ball of the sun has set. Rabbi Yose, however, says that Ben haShemashot is as short as the blink of an eye. | |||
* Rabba explains Rabbi Yehuda as saying that Ben HaShemashot starts from Shekiyah even though the sky is still red, while Rav Yosef says Ben HaShemashot starts from when the bottom of the sun already set. It follows, says the Gemara according to Rabba, the span of Ben HaShemashot is ¾ of a mil and Rav Yosef says that Ben HaShemashot is 2/3 of a mil. | |||
* Shmuel (Shabbat 35a) says that Rav Yose’s concept of Ben HaShemashot takes place after the Ben HaShemashot already finished. Rabbi Yochanan says that we follow Rabbi Yehuda regarding Shabbat as a stringency and Rabbi Yose regarding Trumah as a stringency. | |||
* Then, Shmuel (Shabbat 35b) says that Ben HaShemashot is as long as two stars are seen in the sky, but if there’s only one star, it’s day, and if it’s three, then it’s night. The Gemara then clarifies that the stars which were discussed are medium size stars. | |||
* Rabbi Yochanan in Gemara Pesachim 94a says that an average person can walk 30 mil from Netz HaChama until Shekiyah and 5 mil from Shekiyah until Tzet HaKochavim (according to Rashi D”H Ovav). The Gemara challenges this and explains really an average person can walk 32 mil from Netz HaChama until Shekiyah and only 4 mil from Shekiyah until Tzet HaKochavim. | |||
* Tosfot (Pesachim 94a D”H Rabbi Yehuda and Shabbat 35a) is bothered how the Gemara Shabbat seems to say that from Shekiyah until Tzet HaKochavim a person can walk ¾ of a mil (according to the Rabba) and the Gemara Pesachim says a person can walk 4 mil. Rabbenu Tam answers that the Gemara Shabbat was referring to the end of the Shekiyah and from then until Tzet HaKochavim is ¾ of a mil, while the Gemara Pesachim is discussing the end of Shekiyah which takes 4 mil until Tzet HaKochavim. | |||
What did Rabbi Yose mean? Tosfot (Shabbat 34b Rabbi Yose) explains that even according to Rabbi Yose there’s a window of time when there is an uncertainty whether it is day or night but it isn’t as long as it is for Rabbi Yehuda. </ref> | |||
==References== | ==References== | ||
<references/> | <references/> | ||
