Q. Do you repeat the bracha (when seeing a meteor shower) if you see it next night, or only after 30 days?

A. When you do recite a brocho (see last question,) Mishna Berura (227: 1-2) rules that in the case of a meteor shower you only make one brocho per night. However when reciting over a comet, since it is the same astral object, you do not recite until thirty days have passed (see also Shaarei Teshuvo and Shulchan Hatahor ibid. Kaf Hachaim ibid.: 3, Otzar Halachos p. 278)

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit”a