the giza pyramid complex is not aligned with the heavens
the whole 'orion correlation theory' (the theory that there's a correlation between the three largest pyramids of the giza complex and orion's belt in the orion constellation) is literally a nonsensical fringe theory dismissed by all serious archaeologists as pseudoscience
for starters - we have found absolutely zero evidence from ancient egypt that they constructed these pyramids to be aligned with orion's belt, so that's one mark against the theory. you'd think, with how important the stars and constellations were in ancient egyptian culture, that we'd have some evidence of them showing that they built the pyramids to line up with these three stars.
also there's the fact that the dude who came up with the theory believes that the pyramids line up with orion's belt as it was around the year 10,000 BC...y'know like 7500 years before the giza pyramids were even built and 6800 years before what we would refer to as ancient egypt even began (and he also believed in the 2012 end of the world thing and the existence of atlantic - basically he is not a serious person)
and astronomers have done research to compare how the three largest pyramids are lined up to compare it to how orion's belt would have appeared in 10,000 BC (since that is the date cited by the guy who came up with the theory) using planetarium equipment and...it doesn't match. guy who came up with the theory claims it was a 'perfect match' for how the three stars in the belt of orion were in 10,000 BC. astronomers found that, no, it's not. per their measurements, in 10,000 BC, the angle formed by the belt of orion was 47-50 degrees. the angle formed by the pyramids is 38 degrees. far from a 'perfect match'
also the slightly bent line that the pyramids form is deviated towards the north, but the slight kink in orion's belt goes towards the south, so in order for them to match - you'd need to flip one of them upside down. and hey guess what the person who wrote the book espousing this theory did??? yeah he literally flipped a map of the pyramids upside down to compare it to orion without telling people that he did that.
and other jive too like how the book claims other things like how the nile river represents the milky way and the sphinx represents the constellation leo.
but uhh a couple small issues there:
1. the position of the sphinx in the complex in relation to the nile, if it represents the milky way, and the three largest pyramids of the giza complex, if it represents the belt of orion, is in the wrong damn position
2. the ancient egyptians did not ******* know about the constellation of leo. literally leo and all the other constellations were know of in the modern day were completely unknown in ancient egypt and appear in absolutely ZERO ancient egyptian star charts. there are no references to any of these constellations in egypt until the greco-roman era of egypt.
like mind you: i should say that the pyramids (and many other buildings and temples in ancient egypt) were built with celestial significance (because the stars and constellations is how they kept track of time and stuff relating to their religions). like that is very much an uncontroversial thing. (like the corners of the great pyramid align so well with the four cardinal directions and most researches accept that the ancient egyptian engineers used the motion of the sun)
but the whole thing about 'the pyramids are specifically alligned with the three stars of orion's belt' thing? yeah nah that jive is like straight bunk.