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Show HN: I 3D scanned the interior of the Great Pyramid at Giza

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Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#171

Post by gigaflop »

JofArnold wrote: post #120

Incredible. Thank you so much for that. What an incredible project and one I think will make a huge impact for years. Question. I noticed a very unusual experience I've not felt before in a 3D world; I started to feel claustrophobic - so much so I had to close the tab. I'm curious; has anyone else experienced the same do you know? If so, any ideas why it should be so powerful a feeling in this particular case?

I'm a tall guy, and started feeling claustrophobic when I saw what some of the tunnel entrances looked like. I never used the measurement tool to verify, but they looked like they'd have made me prefer crawling instead of crouching.

Something that confirmed my suspicion: In the King's chamber, 'stand' next to the sarcophagus, and look behind you. I won't explain further.

Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#174

Post by pencilguin »

The King's Chamber measures 10x20x10 cubits, as precisely as Egyptians could cut stone, providing us a very precise measure of the builders' cubit. By outstanding coincidence, the chamber is exactly 5pi/3 meters wide. (This also equals 2phi² meters.)

The diagonal from corner to opposite corner is 10+sqrt(2) meters, to three places.

The ancient Egyptians would have been awed by such coincidences. Us, not so much.

I don't know of anyplace where ancient Egyptians demonstrated knowledge of phi, which has the wondrous properties that 1/phi+1=phi=phi²-1. They could of course measure pi as precisely as they liked just by tracing a big circle.

Some people make a big deal about the perimeter of its base matching its height times 2pi, and about ratios of these dimensions to the sizes of the Earth, Moon, and Sun. Khafre's is a bit smaller, so its ratios would be off.

Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#175

Post by imagineerschool »

The 'mystery' chamber in the base of the Great Pyramid is a functioning pulse pump - this researcher measured it and built a scale replica: https://sentinelkennels.com/Research_Article_V41.html

The mechanisms of the Great Pyramid can only be conjectured about in the present day because of the extensive damage to the structure, but it's pretty clear it served /some/ purpose.

Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#178

Post by hfo »

alberth wrote: post #127

My takeaways: - From the entrance, all the way to the Grand Gallery ... it doesn't not feel like that was an intended entrance path. It gives the vibe of an auxiliary tunnel (not main path). - It's extremely "industrial". For what historians claim to be a monument, there's not a single hieroglyphic that I saw. It was the opposite of being ornate or lavish. - There's numerous deep groves intended to guide something la…

> For what historians claim to be a monument, there's not a single hieroglyphic that I saw.

It's the pyramid of Khufu, 2nd king of the 4th dynasty. None of the pyramids of the 4th dynasty have hieroglyphs. That slowly came into fashion in the 5th (or 6th? Too lazy to check) dynasty. If you measure ancient egypt from the 1st dynasty to Cleopatra, you come up with roughly 3000 years. This pyramid was built around the year 500 on that scale. There is not much writing left at all from that period. The palermo stone being one example: https://en.wikipedia.org/wiki/Palermo_Stone The most exiting recent find is the diary of Merer: https://en.wikipedia.org/wiki/Diary_of_Merer It seems he was a middle manager in transporting stones to this, Khufus pyramid, which makes his writings the closest you can get to an eye witness account of the construction.

Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#179

Post by [deleted] »

imagineerschool wrote: post #175

The 'mystery' chamber in the base of the Great Pyramid is a functioning pulse pump - this researcher measured it and built a scale replica: https://sentinelkennels.com/Research_Article_V41.html The mechanisms of the Great Pyramid can only be conjectured about in the present day because of the extensive damage to the structure, but it's pretty clear it served /some/ purpose.

[deleted]

Re: Show HN: I 3D scanned the interior of the Great Pyramid at Giza

#180

Post by jakeinspace »

mwint wrote: post #141
kridsdale2 wrote: post #100

Earlier quoted context omitted.

In a few hundred years geopolitical balances could be wildly different than today: Egypt could somehow come to dominate as a new global empire with Cairo as it's capital, opening it to the vulnerability of a nuclear attack, removing the pyramids before we ever get to develop the scanning technology.

I wonder… would a nuclear attack wipe out the pyramids? Not one directly on them, but centered on the nearby city?

The Giza complex is right next to Cairo. Actually, it might be within the city limits. Far enough from the downtown core to survive a single moderate nuclear blast I would think.
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