I'm investigating proposed alignments between pyramid* shafts and constellations for a video project, and for it, I need to know shaft angles and directions, the directions with respect to true North on Earth (or easily convertible). My problem in looking into this has been that the pyramids are so steeped in new- (and old-) age pseudoscience that online resources I find are all of questionable veracity (i.e., they seem legit but then conclude that the angles are harmonic magical things therefore it was built by aliens).
Can someone point me to the answer via a reputable resource? I would assume with all the study of the pyramids over the centuries that these things are known and agreed upon by legitimate archaeologists.
*I'm referring to the three main ones in Egypt -- Khufu, Khafre, and Menkaure.