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This is also interpreted to mean "the firmament of Djedefre", or "Djedefre's starry sky". The accent here is on the sky, whereas the word "star" is merely an adjective, or specifically, a determinitive to explain the meaning of the word "sehedu".

That would be more consistent with the GP being called "the Horizon of Khufu". Either way, it's interesting that there's an apparent stellar, or night sky association with the earlier pyramids, whereas there's a solar one with Khufu's (according to Hawass, anyway).