Explanation #1: This teaches us that even where the Minhag is not to recite B'rachah afterwards, on Pesach night one needs to do so ...

Reason: Because if it was the Minhag, it would be obvious.

Explanation #2: Alternatively, even where it is customary to recite it, one would have thought that that is specifically during the day, but at night-time it is not necessary.

Explanation: It seems that he means to say 'also Nishmas Kol Chai ...

Proof: Because otherwise, whose opinion do we follow.

Reason for Name: And he calls 'Nishmas Kol Chai' 'Birchas ha'Shir', because on Shabbasos we say it after Pesukei de'Zimrah.

Explanation #2: Rabeinu Chayim Kohen however, did not conclude with Yehalelucha', only with 'Nishmas' ...

Proof: Since the Lashon 'Birchas ha'Shir' implies one B'rachah (And not two).

Clarification: That is what we do, and "Ran'nu Tzadikim" (Kapitel 33) is not included.

Clarification: The stars remained in their place, only the ends reached earth.

Support: And this is how Rashi explains it in his explanation on T'nach.

Question: According to the opinion in Perek Mi she'Hayah (above, Daf 94.) that 'The entire world is situated underneath one star', how is it possible for all the stars to have descended, seeing as one of them would have already filled the world?

Answer: The Gemara in ('Mi she'Hayah') is speaking specifically about the stars that belong to the stars that belong to the Galgal (the sphere of the zodiac); the other stars are much smaller.