What is the minimum requirement for the stars to be 'clustered' (retzufim) rather than scattered?
Synopsis
The Mechaber requires stars to appear clustered, not scattered, due to tosefet Shabbat. The Beur HaGra cites the Yerushalmi that three stars should appear like one star. The Magen Avraham confirms the clustering requirement is based on tosefet Shabbat.
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